Tree planting system, information terminal, and ar glasses

Abstract

This tree planting system comprises a processor. The processor specifies a supplementary planting position indicating a position where a plant body is to be supplementary planted in a tree planting area, acquires plant body data related to the plant body at the supplementary planting position, and stores management data in which the plant body and the plant body data are associated with each other.

Description

TITLE OF THE INVENTION: AFFORESTATION SYSTEM, INFORMATION TERMINAL, AND AR GLASSES Field

[0001] The present disclosure relates to an afforestation system, an information terminal, and AR glasses. Background

[0002] In a technical field related to afforestation systems, an afforestation system as disclosed in Patent Literature 1 is known. In Patent Literature 1, a plant is planted in soil by an afforestation machine. Citation List Patent Literature

[0003] Patent Literature 1: JP 2023-158914 A Summary Technical Problem

[0004] Plants planted in soil may die. When plants die, techniques capable of efficiently replanting are desired. Further, when plants die, the plants are replanted by workers. Techniques for supporting afforestation work by workers are desired.

[0005] An object of the present disclosure is to support replanting work. An object of the present disclosure is to support afforestation work. Solution to Problem

[0006] According to this disclosure, an afforestation system comprising a processor is provided. The processor specifies a replanting position indicating a position at which a plant is to be replanted in an afforestation area, acquires plant data regarding the plant at the replanting position, and stores management data in which the plant and the plant data are associated with each other.

[0007] According to this disclosure, an afforestation system comprising a processor is provided. The processor acquires a replanting position indicating a position at which a plant is to be replanted in an afforestation area, calculates a route of a worker who replants the plant at each of a plurality of the replanting positions based on the replanting position, and generates display data including the route.

[0008] According to this disclosure, an afforestation system comprising a processor is provided. The processor acquires a replanting position indicating a position at which a plant is to be replanted in an afforestation area, specifies a completed position indicating the replanting position at which replanting of the plant is completed, and generates display data including the completed position.

[0009] According to this disclosure, an afforestation system comprising a processor is provided. The processor acquires a reality image of an afforestation area captured by a camera, generates an augmented reality image for supporting afforestation work in the afforestation area, and causes a display device to display the augmented reality image to be superimposed on the reality image. Advantageous Effects of Invention

[0010] According to the present disclosure, it is possible to support replanting work. According to the present disclosure, it is possible to support afforestation work. Brief Description of Drawings

[0011] FIG. 1 is a diagram schematically illustrating an afforestation system according to an embodiment. FIG. 2 is a perspective view illustrating an afforestation machine according to the embodiment. FIG. 3 is a hardware configuration diagram illustrating a server according to the embodiment. FIG. 4 is a functional block diagram illustrating an afforestation system according to the embodiment. FIG. 5 is a functional block diagram illustrating an information terminal according to the embodiment. FIG. 6 is a diagram schematically illustrating an afforestation area and a storage area according to the embodiment. FIG. 7 is a flowchart illustrating a death determination method for a sapling according to the embodiment. FIG. 8 is a diagram illustrating a method of generating a learned model according to the embodiment. FIG. 9 is a diagram illustrating an example of display data displayed on a display device of the information terminal according to the embodiment. FIG. 10 is a diagram illustrating an example of display data displayed on the display device of the information terminal according to the embodiment. FIG. 11 is a diagram illustrating an example of a route of a worker displayed on the display device of the information terminal according to the embodiment. FIG. 12 is a diagram illustrating an example of a route of a worker displayed on the display device of the information terminal according to the embodiment. FIG. 13 is a diagram illustrating an example of a route of a worker displayed on the display device of the information terminal according to the embodiment. FIG. 14 is a diagram illustrating a method of specifying a completed position according to the embodiment. FIG. 15 is a flowchart illustrating a support method for a worker according to the embodiment. FIG. 16 is a diagram illustrating an example of management data displayed on the display device of the information terminal according to the embodiment. FIG. 17 is a flowchart illustrating a plant data processing method according to the embodiment. FIG. 18 is a diagram illustrating an example of a reality image and an AR image displayed on the display device of the information terminal according to the embodiment. FIG. 19 is a flowchart illustrating a method of generating display data including an AR image according to the embodiment. FIG. 20 is a diagram schematically illustrating AR glasses according to the embodiment. FIG. 21 is a diagram illustrating an example of a reality image and an AR image displayed on a display device of the AR glasses according to the embodiment. Description of Embodiments

[0012] [Afforestation System] FIG. 1 is a diagram schematically illustrating an afforestation system 1 according to an embodiment.  The afforestation system 1 manages afforestation work.  The afforestation system 1 supports afforestation work. The afforestation work includes planting work and replanting work. Planting refers to planting a plant in soil. Replanting refers to planting a new plant in soil in which a plant was planted by planting work. For example, when a plant that was planted by planting work dies, replanting may include planting a new plant at a position of the dead plant. A sapling is exemplified as the plant. In the following description, the plant is appropriately referred to as a sapling 8.

[0013] The afforestation system 1 includes a server 2, an afforestation machine 3, an information terminal 4, and a moving body 9. The server 2 includes a computer. The afforestation machine 3 operates in an afforestation area 11 (see FIG. 6) where afforestation work is performed. The afforestation machine 3 plants the saplings 8 in the soil of the afforestation area 11. The server 2 is located outside of the afforestation machine 3.  The server 2 may be located within the afforestation area 11 or may be located outside the afforestation area 11. In the embodiment, the server 2 is located at a remote place of the afforestation area 11. The information terminal 4 is carried by an employee 100 engaged in afforestation work. In the embodiment, the information terminal 4 is a tablet terminal.  The information terminal 4 may be a smartphone or a laptop personal computer. The moving body 9 moves in the afforestation area 11. In the embodiment, the moving body 9 is an unmanned aerial vehicle (UAV) such as a drone. The moving body 9 flies above the afforestation area 11.

[0014] The server 2, the afforestation machine 3, the information terminal 4, and the moving body 9 communicate with each other via a communication system 5. The communication system 5 includes at least one of a mobile phone communication line, an Internet communication line, and a communication satellite line.

[0015] The employees 100 include a manager 101 of the afforestation area 11 and workers 102 of the afforestation work. The manager 101 supervises the workers 102.

[0016] The afforestation machine 3 performs planting work. The worker 102 performs replanting work. The worker 102 carries a portable afforestation tool 6 called a hand planter. The worker 102 performs the replanting work using the afforestation tool 6. The worker 102 carries a basket 7 in which a plurality of saplings 8 are accommodated. When the worker performs the replanting work, the worker plants the sapling 8 taken out from the basket 7 in the soil using the afforestation tool 6.

[0017] [Afforestation Machine] FIG. 2 is a perspective view illustrating the afforestation machine 3 according to the embodiment. The afforestation machine 3 plants the saplings 8 in the soil of the afforestation area 11. The afforestation machine 3 includes a vehicle body 31, a traveling device 32, a planting device 33, a controller 34, and a position sensor 35.

[0018] The vehicle body 31 is located above the traveling device 32. The traveling device 32 supports the vehicle body 31. The traveling device 32 travels in the afforestation area 11. The traveling device 32 includes a pair of crawler belts rotated by power generated by an engine. The traveling device 32 may include wheels.

[0019] The planting device 33 plants the sapling 8 in the soil. The planting device 33 is located in front of the vehicle body 31. The planting device 33 includes an arm 36, a frame 37, a hydraulic cylinder 38, and a plurality of planting units 39. In the embodiment, three planting units 39 are provided at intervals in a vehicle width direction of the vehicle body 31. The arm 36 is attached to a frame of the traveling device 32 and liftably supports the planting device 33. The frame 37 is attached to a distal end of the arm 36 and supports the plurality of planting units 39. The hydraulic cylinder 38 is provided between a front portion of the vehicle body 31 and the frame 37, and moves the frame 37 up and down by extending and contracting.

[0020] The planting unit 39 includes a plant holding portion 39A, a main body portion 39B, and an expansion / contraction portion 39C. The plant holding portion 39A is provided in an upper portion of the main body portion 39B. The main body portion 39B is attached to the frame 37. The expansion / contraction portion 39C protrudes downward from a lower portion of the main body portion 39B.

[0021] The plant holding portion 39A holds the sapling 8. The main body portion 39B takes out the sapling 8 from the plant holding portion 39A and sends the sapling 8 to the expansion / contraction portion 39C. The expansion / contraction portion 39C extends in a vertical direction while holding the sapling 8, and plants the sapling 8 in the soil. The expansion / contraction portion 39C is expanded / contracted by, for example, a hydraulic cylinder. By the expansion and contraction of the expansion / contraction portion 39C, the sapling 8 can be planted in the soil even when the soil is not flat and a distance between the main body portion 39B and the soil changes.

[0022] The controller 34 includes a computer. The controller 34 outputs control signals for controlling the traveling device 32 and the planting device 33. The controller 34 communicates with the server 2 via the communication system 5.

[0023] The position sensor 35 detects a position of the afforestation machine 3. The position of the afforestation machine 3 is detected using a global navigation satellite system (GNSS). The global navigation satellite system includes a global positioning system (GPS).  The global navigation satellite system detects a position in a global coordinate system defined by coordinate data of latitude, longitude, and altitude. The global coordinate system is a coordinate system fixed to the earth. The position sensor 35 includes a GNSS receiver and detects a position of the afforestation machine 3 in the global coordinate system.

[0024] In the embodiment, the position sensor 35 is provided in the vehicle body 31. The position sensor 35 detects a position of the vehicle body 31. Detection data of the position sensor 35 is transmitted to the controller 34. The controller 34 can calculate a planting position indicating a position of the sapling 8 planted in the soil of the afforestation area 11 based on the detection data of the position sensor 35 and a time point at which the planting device 33 planted the sapling 8 in the soil. The position sensor 35 detects a position of the position sensor 35 (self-position). A relative position between the position sensor 35 and the planting device 33 is known data derived from design data or specification data of the afforestation machine 3. The controller 34 can calculate a planting position of the sapling 8 based on the detection data of the position sensor 35, the relative position between the position sensor 35 and the planting device 33 that is known data, and the time point at which the planting device 33 planted the sapling 8 in the soil.  The controller 34 transmits the planting position of the sapling 8 to the server 2. The position sensor 35 may be located in the planting device 33. The controller 34 can calculate the planting position of the sapling 8 based on the detection data of the position sensor 35 that detects a position of the planting device 33 and the time point at which the planting device 33 planted the sapling 8 in the soil.

[0025] [Server] FIG. 3 is a hardware configuration diagram illustrating the server 2 according to the embodiment. The server 2 includes a computer 10. The server 2 includes a processor 10A such as a central processing unit (CPU), a main memory 10B including a nonvolatile memory such as a read only memory (ROM) and a volatile memory such as a random access memory (RAM), a storage 10C such as a hard disk or a semiconductor memory, an input / output interface 10D including an input / output circuit, and a communication interface 10E including a communication circuit. Functions of the processor 10A are stored as a computer program 10F in the storage 10C. The processor 10A reads the computer program 10F from the storage 10C, loads the computer program 10F in the main memory 10B, and executes processing according to the computer program 10F. The computer program 10F may be distributed to the server 2 via a network.

[0026] The controller 34 of the afforestation machine 3 also includes a computer. Each of a controller 41 (see FIGS. 4 and 5) of the information terminal 4 and a controller 91 (see FIG. 4) of the moving body 9 to be described below also includes a computer. Similarly to the server 2, each of the controller 34 of the afforestation machine 3, the controller 41 of the information terminal 4, and the controller 91 of the moving body 9 includes a processor, a main memory, a storage, an input / output interface, and a communication interface.

[0027] FIG. 4 is a functional block diagram illustrating the afforestation system 1 according to the embodiment. The server 2 includes a plurality of functional units. The functional units of the server 2 include a planting position acquisition unit 21, a captured image acquisition unit 22, a replanting position specification unit 23, a work area setting unit 24, an input data acquisition unit 25, and a display data generation unit 26. Functions of the functional units of the server 2 are exerted by the processor 10A. The server 2 includes a storage unit 27. The function of the storage unit 27 of the server 2 is exerted by the storage 10C.

[0028] The afforestation machine 3 includes the controller 34 and the position sensor 35. The information terminal 4 includes the controller 41, an input device 42, a display device 43, a camera 44, and a sensor system 48. The sensor system 48 includes a position sensor 45 and a motion sensor 47. The moving body 9 includes the controller 91, a camera 92, and a position sensor 93.

[0029] The controller 41 of the information terminal 4 communicates with the server 2 via the communication system 5. The input device 42 generates input data by being operated by the employee 100. Examples of the input device 42 include a touch panel, a button, and a computer keyboard. The display device 43 displays display data. The display device 43 provides the display data to the employee 100. As the display device 43, a flat panel display such as a liquid crystal display or an organic EL display is exemplified. The camera 44 images at least the afforestation area 11. The position sensor 45 includes a GNSS receiver and detects a position of the information terminal 4 in the global coordinate system. A position of the display device 43 in the global coordinate system is detected by detecting the position of the information terminal 4. The motion sensor 47 detects a movement of the information terminal 4. Examples of the motion sensor 47 include an inertial sensor (IMU), an acceleration sensor, and a gyro sensor.

[0030] The controller 91 of the moving body 9 communicates with the server 2 via the communication system 5. The camera 92 is mounted on the moving body 9. The camera 92 images at least the afforestation area 11. The camera 92 images the afforestation area 11 from above the afforestation area 11. The position sensor 93 detects a position of the moving body 9. The position sensor 93 includes a GNSS receiver and detects the position of the moving body 9 in the global coordinate system. A position of the camera 92 in the global coordinate system is detected by detecting the position of the moving body 9.

[0031] The planting position acquisition unit 21 acquires a planting position indicating a position of the sapling 8 planted in the afforestation area 11 by the afforestation machine 3. As described above, the controller 34 of the afforestation machine 3 calculates the planting position of the sapling 8 based on the detection data of the position sensor 35 and the time point at which the planting device 33 planted the sapling 8 in the soil. The planting position acquisition unit 21 acquires the planting position of the sapling 8 from the controller 34 of the afforestation machine 3. The detection data of the position sensor 35 detecting the position of the afforestation machine 3 and time point data indicating the time point at which the planting device 33 planted the sapling 8 in the soil may be transmitted from the controller 34 of the afforestation machine 3 to the server 2. The server 2 may calculate the planting position of the sapling 8 based on the detection data of the position sensor 35 detecting the position of the afforestation machine 3 and the time point at which the planting device 33 planted the sapling 8 in the soil.

[0032] The captured image acquisition unit 22 acquires a captured image indicating an image of the afforestation area 11 imaged by the camera 92. The controller 91 of the moving body 9 transmits the captured image captured by the camera 92 to the server 2. The captured image acquisition unit 22 acquires the captured image from the controller 91 of the moving body 9.

[0033] The controller 91 of the moving body 9 calculates the position of the captured image in the global coordinate system based on the detection data of the position sensor 93. The controller 91 acquires the position of the captured image in a camera coordinate system defined in the camera 92. The controller 91 converts the position of the captured image in the camera coordinate system into a position of the captured image in the global coordinate system based on the detection data of the position sensor 93. The captured image acquisition unit 22 acquires a captured image of which a position in the global coordinate system is defined from the controller 91 of the moving body 9.

[0034] The replanting position specification unit 23 specifies a replanting position from a plurality of planting positions of the sapling 8. The replanting position refers to a position at which the sapling 8 is to be replanted. Replanting refers to planting of a new sapling 8 in the soil in which the sapling 8 was planted by planting work. For example, when the sapling 8 planted by the planting work dies, the replanting may include planting of a new plant at a position of the dead sapling 8. The replanting position may include a dead position at which there is the dead sapling 8. The replanting position specification unit 23 acquires the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11. The replanting position specification unit 23 acquires the replanting position indicating the position of the dead sapling 8 from the plurality of saplings 8 planted in the afforestation area 11.

[0035] The replanting position specification unit 23 specifies a survival position from a plurality of planting positions of the sapling 8. The survival position refers to a position at which the sapling 8 is not to be replanted. That is, the survival position refers to a position at which the sapling 8 that is not dead is planted. The replanting position specification unit 23 acquires the survival position indicating the position of the sapling 8 that is not dead from the plurality of saplings 8 planted in the afforestation area 11.

[0036] Based on the captured image of the afforestation area 11 acquired by the captured image acquisition unit 22, the replanting position specification unit 23 determines whether the sapling 8 planted at the planting position is dead. The storage unit 27 stores in advance a reference image indicating an image of at least one of the dead sapling 8 and the sapling 8 that is not dead. The replanting position specification unit 23 determines whether the sapling 8 planted at the planting position is dead by collating the reference image with a captured image. The replanting position specification unit 23 can specify the survival position and the replanting position by determining whether the sapling 8 planted at the planting position is dead.

[0037] In the embodiment, the fact that the sapling 8 is dead includes the fact that the sapling 8 is absent from a position to be planted. For example, the sapling 8 is likely not to be planted unintentionally due to a defect of the afforestation machine 3. After the sapling 8 is planted in the planting position, for example, an animal is likely to remove the sapling 8 from the planting position. The replanting position specification unit 23 also determines that the sapling 8 is dead when the sapling 8 is absent unintentionally from the planting position. The fact that the sapling 8 is dead includes a situation in which it is difficult to grow the planted sapling 8. After the sapling 8 is planted at the planting position, for example, the sapling 8 may be stepped on by a tire of a vehicle or immersed in a puddle, and growth of the sapling 8 is likely to be difficult although the sapling 8 is not dead. The replanting position specification unit 23 determines that the sapling 8 is dead even in a situation where growth of the sapling 8 is difficult.

[0038] The work area setting unit 24 sets a work area (see FIG. 11) of the worker 102 who replants at the replanting position in the afforestation area 11.

[0039] The input data acquisition unit 25 acquires plant data regarding the sapling 8 at the replanting position. The input data acquisition unit 25 acquires plant data regarding the dead sapling 8 at the replanting position. The employee 100 operates the information terminal 4 to input the plant data. The information terminal 4 is operated by the employee 100 to generate plant data. The plant data includes image data of the dead sapling 8 imaged by the camera 44. The plant data includes text data regarding the dead sapling 8 input from the input device 42. The input data acquisition unit 25 acquires the plant data from the information terminal 4 via the communication system 5.

[0040] The display data generation unit 26 generates display data to be displayed on the display device 43 of the information terminal 4. The display data generated by the display data generation unit 26 is transmitted to the information terminal 4. The controller 41 of the information terminal 4 causes the display device 43 to display the display data transmitted from the display data generation unit 26.

[0041] [Information Terminal] FIG. 5 is a functional block diagram illustrating the information terminal 4 according to the embodiment. The information terminal 4 includes a plurality of functional units. The functional units of the information terminal 4 include an afforestation position acquisition unit 411, a work area acquisition unit 412, a route calculation unit 413, a completed position specification unit 414, a reality image acquisition unit 415, an augmented reality processing unit 416, and a display control unit 417. Functions of the functional units of the information terminal 4 are exerted by the processor of the controller 41.

[0042] The afforestation position acquisition unit 411 acquires the survival position and the replanting position of the sapling 8 specified by the replanting position specification unit 23. The afforestation position acquisition unit 411 acquires the survival position and the replanting position of the sapling 8 from the replanting position specification unit 23 of the server 2 via the communication system 5.

[0043] The work area acquisition unit 412 acquires the work area of the worker 102 set by the work area setting unit 24. The work area acquisition unit 412 acquires the work area of the worker 102 from the work area setting unit 24 of the server 2 via the communication system 5.

[0044] The route calculation unit 413 calculates a route of the worker 102 who replants the sapling 8 at each of the plurality of replanting positions based on the replanting position of the sapling 8 acquired by the afforestation

[0045] The completed position specification unit 414 specifies a completed position indicating a replanting position at which the replanting of the sapling 8 is completed among the plurality of replanting positions. The completed position specification unit 414 specifies an uncompleted position indicating a replanting position at which the replanting of the sapling 8 is not completed among the plurality of replanting positions. The completed position specification unit 414 can specify the completed position based on the detection data of the position sensor 45.

[0046] The reality image acquisition unit 415 acquires a reality image indicating an image of the afforestation area 11 imaged by the camera 44.

[0047] The augmented reality processing unit 416 generates an augmented reality image for supporting afforestation work in the afforestation area 11.

[0048] The display control unit 417 controls the display device 43. The display control unit 417 causes the display device 43 to display the display data generated by the display data generation unit 26 of the server 2. The display control unit 417 can generate display data to be displayed on the display device 43.

[0049] [Afforestation Area and Storage Area] FIG. 6 is a diagram schematically illustrating the afforestation area 11 and a storage area 12 according to the embodiment. As illustrated in FIG. 6, the afforestation area 11 where the sapling 8 is to be planted is set. An area of the afforestation area 11 is, for example, 10 ha or more. The afforestation machine 3 plants the sapling 8 in the afforestation area 11.

[0050] The storage area 12 where the sapling 8 to be replanted is located is provided in at least a part of the periphery of the afforestation area 11. In the storage area 12, the basket 7 accommodating a plurality of sapling 8 is stored. When the replanting work is performed, the worker 102 carries the basket 7 stored in the storage area 12 and then moves to the replanting position. After moving to the replanting position, the worker 102 plants the sapling 8 taken out from the basket 7 at the replanting position using the afforestation tool 6.

[0051] [Death Determination for Sapling] FIG. 7 is a flowchart illustrating a death determination method for the sapling 8 according to the embodiment. In the afforestation area 11, the planting work is performed by the afforestation machine 3. The planting position acquisition unit 21 acquires the planting position indicating the position of the sapling 8 planted in the afforestation area 11 by the afforestation machine 3. The planting position acquired by the planting position acquisition unit 21 is stored in the storage unit 27 (step SA1).

[0052] After a predetermined period elapses from the planting work, the moving body 9 flies over the afforestation area 11, and the camera 92 captures an image of the afforestation area 11. The capturing of the afforestation area 11 by the camera 92 is performed, for example, after one week to one year elapses from the planting work. As an example, the capturing of the afforestation area 11 by the camera 92 is performed 15 days after the planting work.

[0053] The captured image acquisition unit 22 acquires a captured image indicating the image of the afforestation area 11 captured by the camera 92 (step SA2).

[0054] The replanting position specification unit 23 determines whether the sapling 8 is dead based on the captured image of the afforestation area 11 acquired by the captured image acquisition unit 22. The replanting position specification unit 23 determines whether the sapling 8 is dead based on the reference image indicating the image of at least one of the dead sapling 8 and the sapling 8 that is not dead and the captured image of the afforestation area 11 (step SA3).

[0055] After the planting work is performed, a part of the plurality of saplings 8 planted by the planting work are likely to die due to weather, pests such as ants, a surrounding natural environment, a state of soil, or the like. As described above, the sapling 8 is likely to be absent unintentionally from the planting position. Growth of the sapling 8 is likely to be difficult. After a predetermined period elapses from the planting work, it is determined whether the sapling 8 is dead.

[0056] The replanting position specification unit 23 may determine whether the sapling 8 is dead by, for example, a template matching method. The replanting position specification unit 23 may determine whether the sapling 8 is dead based on an artificial intelligence (AI) algorithm. In the embodiment, a learned model that has the captured image of the afforestation area 11 as an input and has a result of the death determination for the sapling 8 as an output is stored in advance in the storage unit 27. The replanting position specification unit 23 determines whether the sapling 8 is dead using the learned model stored in the storage unit 27.

[0057] FIG. 8 is a diagram illustrating a method of generating a learned model according to the embodiment. In the embodiment, a learned model is generated by supervised machine learning. As illustrated in FIG. 8, in a learning stage of machine learning, a plurality of training images of the sapling 8 are input to a learning device 20. The training image is an example of the reference image. The training images of the sapling 8 include a training image of the sapling 8 that is not dead and a training image of the dead sapling 8. For the training image of the sapling 8, a dead state of the sapling 8 is given as a correct label. The training image of the sapling 8 that is not dead is given a label "sapling that is not dead" as a correct label. The training image of the dead sapling 8 is given a label "dead sapling" as a correct label. The learning device 20 performs supervised machine learning on the training image, and generates the learned model that has the captured image as an input and has the result of the death determination for the sapling 8 as an output. The learned model generated by the learning device 20 is stored in the storage unit 27. The learning device 20 may be a functional unit of the server 2 or may be realized by a computer different from the server 2.

[0058] The replanting position specification unit 23 determines whether the sapling 8 planted in the afforestation area 11 is dead using the learned model generated by the learning device 20. The captured image of the sapling 8 acquired by the captured image acquisition unit 22 is input to the learned model. The replanting position specification unit 23 inputs the captured image of the sapling 8 acquired by the captured image acquisition unit 22 to the learned model as input data.  When the captured image of the sapling 8 is input to the learned model, the result of the death determination for the sapling 8 is output as output data.

[0059] The replanting position specification unit 23 determines whether each of the plurality of saplings 8 planted in the afforestation area 11 is dead (step SA4).

[0060] The replanting position specification unit 23 specifies the replanting position from the plurality of planting positions based on the result of the death determination for the sapling 8 (step SA5). As described above, the replanting position indicates the position of the dead sapling 8. The replanting position specification unit 23 specifies the planting position of the sapling 8 determined to be dead as the replanting position.

[0061] The replanting position specification unit 23 specifies the survival position from the plurality of planting positions based on the result of the death determination for the sapling 8 (step SA6). As described above, the replanting position indicates the position of the sapling 8 that is not dead. The replanting position specification unit 23 specifies the planting position of the sapling 8 determined not to be dead as the survival position.

[0062] The display data generation unit 26 generates display data including the result of the death determination for the sapling 8 by the replanting position specification unit 23 (step SA7). In the embodiment, the display data generation unit 26 generates the display data based on the replanting position and the survival position specified by the replanting position specification unit 23. The display data generated by the display data generation unit 26 is transmitted to the information terminal 4. The controller 41 of the information terminal 4 causes the display device 43 to display the display data transmitted from the display data generation unit 26.

[0063] FIG. 9 is a diagram illustrating an example of the display data displayed on the display device 43 of the information terminal 4 according to the embodiment. The display data displayed on the display device 43 includes a symbol 15 indicating the result of the death determination for the sapling 8 by the replanting position specification unit 23. In the embodiment, the symbol 15 is a circular (dot-shaped) image. The symbol 15 includes a survival position symbol 151 indicating the sapling 8 determined not to be dead and a replanting position symbol 152 indicating the sapling 8 determined to be dead. The survival position symbol 151 is displayed at the survival position of the sapling 8. The replanting position symbol 152 is displayed at the replanting position of the sapling 8. The survival position symbol 151 indicates the survival position. The replanting position symbol 152 indicates the replanting position. The survival position symbol 151 indicates the position of the sapling 8 that is not dead. The replanting position symbol 152 indicates the position of the dead sapling 8. A display form of the survival position symbol 151 is different from a display form of the replanting position symbol 152. In the embodiment, the survival position symbol 151 is displayed in a first color (for example, green). The replanting position symbol 152 is displayed in a second color (for example, red).

[0064] The symbol 15 is displayed on the display device 43 together with the captured image captured by the camera 92. The symbol 15 is superimposed and displayed on the captured image captured by the camera 92. The display data generation unit 26 generates display data in which the survival position symbol 151 and the replanting position symbol 152 are superimposed on the captured image.  The display data generation unit 26 superimposes the survival position symbol 151 on the sapling 8 determined not to be dead and superimposes the replanting position symbol 152 on the sapling 8 determined to be dead in the captured image. That is, the display data generation unit 26 superimposes and displays the survival position symbol 151 on the survival position and superimposes and displays the replanting position symbol 152 on the replanting position in the captured image.

[0065] Since the display data including the result of the death determination for the sapling 8 is generated, the worker 102 can efficiently perform the replanting work by checking the display data. Since the replanting position symbol 152 indicating the replanting position is displayed on the display device 43, the worker 102 can efficiently perform the replanting work by checking the display device 43.

[0066] FIG. 10 is a diagram illustrating an example of the display data displayed on the display device 43 of the information terminal 4 according to the embodiment. As illustrated in FIG. 10, in the display device 43 of the information terminal 4, the captured image of the afforestation area 11 captured by the camera 92 and the symbol 15 indicating the result of the death determination for the sapling 8 by the replanting position specification unit 23 are superimposed and displayed. In the example illustrated in FIG. 10, when a first button 18A displayed in an upper left portion of a display screen of the display device 43 is tapped, the survival position symbol 151 is displayed. When a second button 18B is tapped, the replanting position symbol 152 is displayed. The first button 18A and the second button 18B are examples of the input device 42. That is, the display data generation unit 26 can generate display data in which the survival position symbol 151 indicating the position of the sapling 8 that is not dead is superimposed on the captured image of the afforestation area 11 based on the input data from the input device 42. The display data generation unit 26 can generate display data in which the replanting position symbol 152 indicating the position of the dead sapling 8 is superimposed on the captured image of the afforestation area 11 based on the input data from the input device 42.

[0067] FIG. 10 illustrates an example in which the replanting position symbol 152 is superimposed and displayed on the captured image, and the survival position symbol 151 is not displayed. When the first button 18A is tapped, the survival position symbol 151 is superimposed and displayed on the captured image. When both the first button 18A and the second button 18B are tapped, both the survival position symbol 151 and the replanting position symbol 152 are superimposed and displayed on the captured image.

[0068] In the embodiment, the replanting position specification unit 23 calculates a dead rate indicating a proportion of dead saplings 8 in the afforestation area 11, a survival number indicating a total number of saplings 8 that are not dead in the afforestation area 11, and a dead number indicating a total number of dead saplings 8 in the afforestation area 11. The dead rate refers to a ratio of dead saplings 8 among the plurality of saplings 8 planted by the planting work in the afforestation area 11. The survival number indicating the total number of saplings 8 that are not dead is equal to the number of survival positions specified by the replanting position specification unit 23.  The dead number indicating the total number of dead saplings 8 is equal to the number of replanting positions specified by the replanting position specification unit 23.  The display data displayed on the display device 43 includes the dead rate, the dead number, and the survival number. In the example illustrated in FIG. 10, numerical data 19A indicating the dead rate, numerical data 19B indicating the dead number, and numerical data 19C indicating the survival number are displayed in an upper portion of the display screen of the display device 43.

[0069] [Route of Worker Who Performs Replanting Work] The route calculation unit 413 calculates a route of the worker 102 who performs the replanting work. The route calculation unit 413 calculates the route of the worker 102 who replants the sapling 8 at each of the plurality of replanting positions based on the replanting position specified by the replanting position specification unit 23. The route calculation unit 413 calculates the route of the worker 102 based on the replanting position acquired by the afforestation position acquisition unit 411 from the replanting position specification unit 23. The display control unit 417 generates display data including the route of the worker 102 calculated by the route calculation unit 413, and causes the display device 43 to display the display data.

[0070] FIG. 11 is a diagram illustrating an example of the route of the worker 102 displayed on the display device 43 of the information terminal 4 according to the embodiment. In the example illustrated in FIG. 11, the display data displayed on the display device 43 includes a plurality of replanting position symbols 152 indicating the replanting positions, a work area image 17 indicating the work area set for the worker 102, a worker symbol 14 indicating a position of the worker 102 detected by the position sensor 45, and a route image 16 indicating the route of the worker 102. In the embodiment, the work area image 17 is a linear image along the outer edge of the work area. The route image 16 is, for example, an arrow-like image indicating the route and a traveling direction of the worker 102. The route image 16 is an image indicating a recommended route and a recommended traveling direction along which the worker can efficiently perform the work when the worker 102 progresses the replanting work along the route. The route image 16 is displayed, for example, so that the replanting position symbols 152 adjacent to each other are connected. The worker symbol 14 is a circular (dot-shaped) image.

[0071] The display data displayed on the display device 43 includes a start point symbol 152S indicating a start point of the route and an end point symbol 152E indicating an end point of the route. The start point of the route is set to one replanting position among the plurality of replanting positions belonging to the work area. The end point of the route is set to one replanting position among the plurality of replanting positions belonging to the work area. The route image 16 is displayed so that the symbols are connected from the start point symbol 152S to the end point symbol 152E.

[0072] As illustrated in FIG. 11, the display control unit 417 causes the display device 43 to display display data in which the replanting position symbol 152 indicating the replanting position and the worker symbol 14 indicating the position of the worker 102 are superimposed on the route image 16 indicating the route. The display control unit 417 may cause the display device 43 to display display data in which the worker symbol 14 and the route image 16 are superimposed on the captured image (orthographic image) captured by the camera 92.

[0073] The display control unit 417 can display the replanting position symbol 152 based on the replanting position acquired by the afforestation position acquisition unit 411 from the replanting position specification unit 23. The display control unit 417 can display the work area image 17 based on the work area acquired by the work area acquisition unit 412 from the work area setting unit 24. The display control unit 417 can display the worker symbol 14 based on the detection data of the position sensor 45 of the information terminal 4. The information terminal 4 is carried by the worker 102. Therefore, the position of the information terminal 4 detected by the position sensor 45 can be regarded as the position of the worker 102.

[0074] The work area setting unit 24 sets the work area such that the plurality of replanting positions belong to one work area.  The work area setting unit 24 sets a plurality of work areas in the afforestation area 11. A plurality of workers 102 are allocated to each of the plurality of work areas set by the work area setting unit 24. The worker 102 replants the sapling 8 at the replanting position that is in the assigned work area.

[0075] The work area setting unit 24 can set the work area based on input data from the input device 42 of the information terminal 4. The work area setting unit 24 can set the work area based on, for example, input data from the input device 42 operated by the manager 101. The manager 101 operates the input device 42 of the information terminal 4 so that the plurality of work areas are set in the afforestation area 11. The manager 101 operates the input device 42 while checking the afforestation area 11 displayed on the display device 43 of the information terminal 4. When the input device 42 includes a touch panel located on the display screen of the display device 43, the manager 101 operates the touch panel to draw an outer shape of the work area with an input tool such as a finger or a pen while checking the afforestation area 11 displayed on the display device 43. The manager 101 can set a work area that has any size and shape at any position of the afforestation area 11 by operating the touch panel. The manager 101 may operate the touch panel so that the number of replanting positions in each of the plurality of work areas is uniform, or may operate the touch panel so that the size (area) of each of the plurality of work areas is uniform. The input data generated by operating the input device 42 is transmitted from the information terminal 4 of the manager 101 to the server 2. The work area setting unit 24 sets the work area based on the input data from the input device 42 of the information terminal 4. The display control unit 417 displays the work area image 17 based on the work area set by the work area setting unit 24.

[0076] The work area setting unit 24 may set the work area based on a prescribed algorithm.  The work area setting unit 24 may set the work area such that the number of replanting positions belonging to each of the plurality of work areas becomes uniform.

[0077] The work area setting unit 24 may determine the number of replanting positions belonging to each of the plurality of work areas based on a distance between the storage area 12 and the work area. The work area setting unit 24 may set the work area such that the longer the distance between the storage area 12 and the work area is, the smaller the number of replanting positions belonging to the work area is. In other words, the work area setting unit 24 may set the work area such that the shorter the distance between the storage area 12 and the work area is, the larger the number of replanting positions belonging to the work area is. As described above, when the worker 102 performs the replanting work, the worker 102 carries the basket 7 stored in the storage area 12 and then moves to the replanting position. Since the afforestation area 11 is broad, a worker 102 assigned to a work area that has a long distance from the storage area 12 necessarily moves a long distance from the storage area 12 to the work area. By assigning a work area that has a small number of replanting positions to the worker 102 who necessarily moves a long distance, a burden on the plurality of workers 102 is equalized.

[0078] The work area setting unit 24 may determine the number of replanting positions belonging to each of the plurality of work areas based on the number of saplings 8 that can be carried out from the storage area 12 by the worker 102 at one time and the distance between the storage area 12 and the work area. The worker 102 carries out the sapling 8 accommodated in the basket 7 from the storage area 12 and moves to the assigned work area. The number of saplings 8 that can be accommodated in the basket 7 is finite. The number of the baskets 7 that can be carried out by the worker 102 at one time is finite. When the number of replanting positions belonging to the work area is larger than the number of saplings 8 that can be accommodated in the basket 7, the worker 102 necessarily plants all the saplings 8 accommodated in the basket 7 and then goes to the storage area 12 to take a new basket 7 (saplings 8). That is, when the number of replanting positions belonging to the work area is larger than the number of saplings 8 that can be accommodated in the basket 7, the worker 102 necessarily reciprocates between the storage area 12 and the work area. When a work area where the distance from the storage area 12 is longer than a predetermined distance threshold is set, the work area setting unit 24 sets the work area such that the number of replanting positions belonging to the work area is smaller than the number of saplings 8 that can be accommodated in the basket 7. Since the work area is set such that the number of replanting positions belonging to a work area that has a long distance from the storage area 12 is smaller than the number of saplings 8 that can be accommodated in the basket 7, the worker 102 assigned to a work area having a long distance from the storage area 12 does not necessarily reciprocate a long distance between the storage area 12 and the work area. When a work area where the distance from the storage area 12 is equal to or less than the distance threshold is set, the work area setting unit 24 sets the work area such that the number of the replanting positions belonging to the work area is larger than the number of saplings 8 that can be accommodated in the basket 7. The worker 102 assigned to a work area that has a short distance from the storage area 12 necessarily reciprocates between the storage area 12 and the work area, but a reciprocating distance is short. Accordingly, a burden on the plurality of workers 102 is equalized.

[0079] The work area setting unit 24 may set the work area based on proficiency of the plurality of workers 102. Proficiency data indicating the proficiency of the worker 102 is stored in advance in the storage unit 27. The work area setting unit 24 may set the work area based on the proficiency data stored in the storage unit 27. Proficiency includes a speed of replanting work. The work area setting unit 24 may set the work area such that the number of replanting positions belonging to the work area assigned to the worker 102 who has high proficiency increases.

[0080] In a work area to which a plurality of replanting positions belong, the route calculation unit 413 calculates the route of the worker 102 assigned to the work area. The route calculation unit 413 can calculate the route using a known algorithm.

[0081] The route calculation unit 413 may determine the start point of the route based on the current position of the worker 102 detected by the position sensor 45. The route calculation unit 413 may determine, for example, a replanting position closest to the current position of the worker 102 as the start point of the route.

[0082] The route calculation unit 413 may determine one or both of the start point and the end point of the route based on the position of the work area and the position of the storage area 12. As described above, when the worker 102 performs the replanting work, the worker 102 carries the basket 7 stored in the storage area 12 and then moves to the replanting position. When the number of replanting positions belonging to the work area is larger than the number of saplings 8 that can be accommodated in the basket 7, the worker 102 necessarily reciprocates between the storage area 12 and the work area. For example, the route calculation unit 413 may determine, as the start point of the route, a first replanting position closest to the storage area 12 in the work area among the plurality of replanting positions belonging to the work area and may determine, as the end point of the route, a second replanting position next closest to the storage area 12 after the first replanting position.

[0083] The route calculation unit 413 may calculate the route such that the plurality of replanting positions are connected by a shortest distance in one work area. That is, the route calculated by the route calculation unit 413 may be a shortest route when the worker 102 replants the in the work area.

[0084] The route calculation unit 413 may calculate the route based on a topography of the work area. The route calculation unit 413 may calculate the route based on the topography of the work area so that an inclination angle of the route on which the worker 102 moves is equal to or less than a predetermined angle threshold. When a route for guiding the worker 102 from the first replanting position to the second replanting position is calculated, the route calculation unit 413 may calculate the route based on the topography of the work area such that a height difference between the first replanting position and the second replanting position is equal to or less than a predetermined height threshold.

[0085] The worker 102 sequentially replants the sapling 8 at each of the plurality of replanting positions while moving along the route image 16 displayed on the display device 43. As the worker 102 moves, the worker symbol 14 moves on the display screen of the display device 43. The worker 102 moves in the work area so that the worker symbol 14 moves along the route image 16. The worker 102 can efficiently perform the replanting work while moving along the route image 16 displayed on the display device 43.

[0086] FIG. 12 is a diagram illustrating an example of the route of the worker displayed on the display device 43 of the information terminal 4 according to the embodiment. As illustrated in FIG. 12, as the worker 102 moves, the worker symbol 14 also moves. In the embodiment, the completed position specification unit 414 specifies a completed position indicating a replanting position at which replanting of the sapling 8 is completed and an uncompleted position indicating a replanting position at the plurality of replanting positions belonging to the work area. The display control unit 417 generates display data including the completed position and the uncompleted position, and causes the display device 43 to display the display data. As illustrated in FIG. 12, the display control unit 417 generates display data including a completion symbol 1522 indicating the completed position and a non-completion symbol 1521 indicating the uncompleted position. In the example illustrated in FIG. 12, the noncompletion symbol 1521 is in the same display form as the replanting position symbol 152. The completion symbol 1522 is a symbol in which a color of the replanting position symbol 152 is changed. As illustrated in FIG. 12, the display control unit 417 generates display data including the completion symbol 1522, the non-completion symbol 1521, and the route image 16 indicating the route.

[0087] In the embodiment, the route calculation unit 413 determines a replanting position at which performance of the next replanting work is recommended from the plurality of replanting positions based on the current position of the worker 102 detected by the position sensor 45. The display control unit 417 displays the recommended replanting position in a display form different from other replanting positions. The display control unit 417 emphasizes and displays a replanting position at which the worker 102 subsequently performs the replanting work. In the example illustrated in FIG. 12, the replanting position symbol 152 indicating a replanting position at which performance of a next replanting work is recommended is emphasized and displayed by an emphasized image 70. In the example illustrated in FIG. 12, the emphasized image 70 is a ring-shaped image surrounding the replanting position symbol 152. The worker 102 can recognize the replanting position to be replanted next by checking the emphasized replanting position symbol 152.

[0088] FIG. 13 is a diagram illustrating an example of the route of the worker displayed on the display device 43 of the information terminal 4 according to the embodiment. The worker 102 is likely to deviate from the route. As illustrated in FIG. 13, when the worker 102 deviates from the route, the worker symbol 14 deviates from the route image 16. In the embodiment, when it is determined that the worker 102 deviates from the route based on the position of the worker 102 detected by the position sensor 45, the route calculation unit 413 recalculates the route. In the example illustrated in FIG. 13, the route calculation unit 413 determines an uncompleted position closest to the current position of the worker 102 as a replanting position at which the replanting work is performed next. The route calculation unit 413 calculates a route from the current position of the worker 102 to the replanting position at which the replanting work is performed next.  The display control unit 417 displays the route from the current position of the worker 102 to the replanting position at which the replanting work is performed next.  The display control unit 417 emphasizes and displays the replanting position at which the replanting work is performed next by the emphasized image 70. The worker 102 who deviates from the route can return to the route of the replanting position by checking the display data displayed on the display device 43.

[0089] FIG. 14 is a diagram illustrating a method of specifying the completed position according to the embodiment. In the embodiment, based on the detection data of the position sensor 45 detecting the position of the worker 102, the completed position specification unit 414 determines whether a determination condition that the worker 102 stays at the replanting position for a prescribed time or more is satisfied. The prescribed time is a prescribed time and is, for example, 10 seconds or more and 20 seconds or less. When it is determined that the determination condition is satisfied, the completed position specification unit 414 specifies the replanting position as the completed position. That is, when it is determined that the determination condition is satisfied, the completed position specification unit 414 determines that the sapling 8 is replanted at the replanting position.

[0090] The worker 102 replants the sapling 8 at the replanting position using the afforestation tool 6. A certain amount of time from the start to the end of the replanting work of one sapling 8 is taken. The position of the worker 102 (the position of the information terminal 4) does not substantially change during a period in which the replanting work of one sapling 8 is performed. Therefore, the completed position specification unit 414 can determine whether the sapling 8 is replanted at the replanting position by determining whether the determination condition that the worker 102 stays at the replanting position for the prescribed time or more is satisfied based on the detection data of the position sensor 45 detecting the position of the worker 102.

[0091] When a position sensor 61 is provided in the afforestation tool 6, the completed position specification unit 414 may determine whether the sapling 8 is replanted at the replanting position based on the detection data of the position sensor 61. The position sensor 61 includes a GNSS receiver and detects a position of the afforestation tool 6. The detection data of the position sensor 61 is input to the controller 41 of the information terminal 4. The position of the afforestation tool 6 does not substantially change during a period in which the replanting work of one sapling 8 is performed. The completed position specification unit 414 determines whether the determination condition that the afforestation tool 6 stays at the replanting position for the prescribed time or more is satisfied based on the detection data of the position sensor 61 detecting the position of the afforestation tool 6. When it is determined that the determination condition is satisfied, the completed position specification unit 414 can specify the replanting position as the completed position. The detection data of the position sensor 61 may be transmitted to the server 2.

[0092] In another embodiment, the afforestation tool 6 may include an operation member 62 that is operated when the sapling 8 is replanted. After the sapling 8 is accommodated inside the afforestation tool 6 and a lower end portion of the afforestation tool 6 is inserted into the soil, an opening of the lower end portion of the afforestation tool 6 is opened by operating the operation member 62, and the sapling 8 is planted in the soil. An operation signal is generated and transmitted to the controller 41 of the information terminal 4 by operating the operation member 62. The completed position specification unit 414 may specify the replanting position as the completed position based on the operation signal generated when the operation member 62 is operated. When the operation signal is received from the operation member 62 in a state where it is determined that the afforestation tool 6 is located at the replanting position based on the detection data of the position sensor 45 or the position sensor 61, the completed position specification unit 414 may determine that the sapling 8 is replanted at the replanting position. The operation signal may be transmitted to the server 2.

[0093] FIG. 15 is a flowchart illustrating a support method for the worker 102 according to the embodiment. The afforestation position acquisition unit 411 specifies the replanting position from the replanting position specification unit 23 of the server 2 (step SB1). The work area acquisition unit 412 acquires the work area from the work area setting unit 24 of the server 2 (step SB2).

[0094] In the work area to which the plurality of replanting positions belong, the route calculation unit 413 calculates the route of the worker 102 assigned to the work area (step SB3). The display control unit 417 acquires the detection data of the position sensor 45 detecting the position of the worker 102 (step SB4). As described with reference to FIG. 11, the display control unit 417 causes the display device 43 to display the display data in which the replanting position symbol 152 indicating the replanting position and the worker symbol 14 indicating the position of the worker 102 detected by the position sensor 45 are superimposed on the route image 16 indicating the route.

[0095] Based on the detection data of the position sensor 45 detecting the position of the worker, the completed position specification unit 414 determines whether the determination condition that the worker 102 stays at the replanting position for the prescribed time or more is satisfied (step SB5).

[0096] In step SB5, when it is determined that the determination condition is satisfied (step SB5: Yes), the completed position specification unit 414 specifies the replanting position as the completed position (step SB6). As described with reference to FIG. 12, the display control unit 417 changes the replanting position symbol 152 satisfying the determination condition from the noncompletion symbol 1521 to the completion symbol 1522.

[0097] In step SB5, when it is determined that the determination condition is not satisfied (step SB5: No), the completed position specification unit 414 specifies the replanting position as the uncompleted position. The display control unit 417 does not change the display form of the replanting position symbol 152 that does not satisfy the determination condition.

[0098] The display control unit 417 generates the display data according to the determination result in step SB5 and causes the display device 43 to display the display data (step SB7).

[0099] Based on the detection data of the position sensor 45, the route calculation unit 413 determines whether the worker 102 deviates from the route (step SB8). When it is determined in step SB8 that the worker 102 deviates from the route (step SB8: Yes), the route calculation unit 413 recalculates the route based on the current position of the worker 102 detected by the position sensor 45. When it is determined in step SB8 that the worker 102 does not deviate from the route (step SB8: No), the route is not recalculated.

[0100] The completed position specification unit 414 determines whether the saplings 8 are replanted at all the replanting positions in the work area. That is, the completed position specification unit 414 determines whether the replanting work in the work area ends (step SB9). When it is determined in step SB9 that the replanting work in the work area does not end (step SB9: No), the process returns to step SB4. When it is determined that the replanting work in the work area ends (step SB9: Yes), the support of the worker 102 performing the replanting work in the work area ends.

[0101] [Record and Display of Plant Data] In the embodiment, the afforestation system 1 records plant data regarding the dead sapling 8 at the replanting position. As illustrated in FIG. 14, the worker 102 moving to the replanting position can observe the dead sapling 8. The worker 102 collects the plant data regarding the dead sapling 8 at the replanting position.

[0102] The plant data includes image data of the dead sapling 8 captured by the camera 44 of the information terminal 4. The worker 102 captures an image of the dead sapling 8 at the replanting position with the camera 44. The image data of the sapling 8 captured by the camera 44 is transmitted to the server 2 via the communication system 5.

[0103] The plant data includes text data regarding the dead sapling 8 input from the input device 42 of the information terminal 4. The text data includes an observation result of the sapling 8. The worker 102 can operate the input device 42 to input, to the controller 41, the text data indicating the observation result of the dead sapling 8 at the replanting position. The text data includes a reason for the death of the sapling 8. As described above, the sapling 8 is likely to die due to weather, pests such as ants, a surrounding natural environment, a state of soil, or the like. The worker 102 can input the text data indicating the reason for the death of the sapling 8 to the controller 41 by operating the input device 42. The text data input from the input device 42 is transmitted to the server 2 via the communication system 5. The plant data may include an identification number of each of the plurality of saplings 8. Based on the position data of the information terminal 4 when the plant data is input from the input device 42 of the information terminal 4, the plant data and the dead sapling 8 may be associated with each other.

[0104] The plant data may be audio data or video data by a video camera.

[0105] As described above, the fact that the sapling 8 is dead includes the fact that the sapling 8 is absent unintentionally from the planting position and the fact that growth of the sapling 8 is difficult. The plant data may be data regarding the replanting position from which the sapling 8 is absent. That is, the plant data may include image data of the replanting position from which the sapling 8 captured by the camera 44 of the information terminal 4 is absent. When the sapling 8 is stepped on by a tire of a vehicle or immersed in a puddle, the plant data may include image data of a tire mark or image data of the puddle.

[0106] Along with the plant data, position data indicating the position of the dead sapling 8 is transmitted from the information terminal 4 to the server 2 via the communication system 5. The position of the dead sapling 8 is the replanting position and is detected by the position sensor 45.

[0107] The input data acquisition unit 25 of the server 2 acquires the plant data and the position data regarding the sapling 8 transmitted from the information terminal 4. The input data acquisition unit 25 causes the storage unit 27 to store management data in which the replanting position detected by the position sensor 45 and the plant data are associated with each other. The storage unit 27 stores a data group including the plurality of replanting positions and the management data associated with each of the plurality of replanting positions. The management data stored in the storage unit 27 may be data in which the dead sapling 8 and the plant data are associated with each other. For example, the management data in which identification information of the sapling 8 at the replanting position or a symbol corresponding to the sapling 8 and the plant data are associated with each other may be stored in the storage unit 27.

[0108] The display data generation unit 26 generates display data including the management data. The display data including the management data is distributed to each of the plurality of information terminals 4. The display control unit 417 of the information terminal 4 can cause the display device 43 to display the management data distributed from the server 2. The employee 100 can check the management data displayed on the display device 43.

[0109] FIG. 16 is a diagram illustrating an example of the management data displayed on the display device 43 of the information terminal 4 according to the embodiment. As illustrated in FIG. 16, when the management data is stored (registered) in the storage unit 27 for a certain replanting position, the display data generation unit 26 displays a registration symbol 71 indicating that the management data is registered near the replanting position symbol 152 indicating the replanting position at which the management data is registered. When the registration symbol 71 is tapped (selected), designation data for designating the replanting position corresponding to the registration symbol 71 is generated. The registration symbol 71 is an example of the input device 42. As illustrated in FIG. 16, the display control unit 417 causes the display device 43 to display a plant data 72 associated with the designated replanting position based on the designation data for designating the replanting position. In the example illustrated in FIG. 16, the plant data 72 displayed on the display device 43 includes image data 73 of the sapling 8 located at the replanting position, registration date data 74 indicating a registration date on which the plant data regarding the sapling 8 is stored (registered) in the storage unit 27, and text data 75 indicating the reason for the death of the sapling 8.

[0110] FIG. 17 is a flowchart illustrating a plant data processing method according to the embodiment. The replanting position specification unit 23 specifies the replanting position and transmits the replanting position to the first information terminal 4 (step SC1). The first information terminal 4 acquires the replanting position from the server 2 (step SC2). The worker 102 moves to the replanting position while checking the replanting position symbol 152 displayed on the display device 43 of the first information terminal 4. After the worker 102 moves to the replanting position, the worker 102 images the dead sapling 8 at the replanting position with the camera 44, and operates the input device 42 to input the text data including the reason for the death of the sapling 8.  The plant data including the image data of the sapling 8 captured by the camera 44 and the text data regarding the sapling 8 input from the input device 42 is input to the controller 41 (step SC3). The plant data input to the controller 41 of the first information terminal 4 is transmitted to the server 2 via the communication system 5. The input data acquisition unit 25 of the server 2 causes the storage unit 27 to store the management data in which the replanting position is associated with the plant data (step SC4).

[0111] The display data generation unit 26 of the server 2 generates the display data including the management data stored in the storage unit 27 and distributes the display data to each of the plurality of information terminals 4 (step SC5). In the example illustrated in FIG. 17, the display data generation unit 26 distributes the display data including the management data to each of the first information terminal 4 and the second information terminal 4.

[0112] Each of the plurality of information terminals 4 acquires the display data including the management data (step SC6). As described with reference to FIG. 16, when the registration symbol 71 is tapped on the display screen of the display device 43, the plant data 72 is displayed on the display device 43 (step SC7).

[0113] According to the embodiment, the plurality of workers 102 can share the management data. The management data can be browsed with each of the plurality of information terminals 4. When the display device is connected to the server 2, the employee 100 may browse the management data via the display device connected to the server 2. When the input device is connected to the server 2, the employee 100 may operate the input device connected to the server 2 to register the management data in the storage unit 27.

[0114] [Augmented Reality Image] In the embodiment, the afforestation system 1 supports the afforestation work of the worker 102 using augmented reality (AR). In the following description, augmented reality is appropriately abbreviated as AR.

[0115] As described above, the worker 102 operates the afforestation tool 6 to perform the replanting work. When the worker 102 operates the afforestation tool 6, an augmented reality image (AR image) for supporting the replanting work using the afforestation tool 6 is displayed on the display device 43 of the information terminal 4. The display device 43 superimposes and displays the reality image of the afforestation area 11 including the sapling 8 and the AR image. By displaying the AR image superimposed on the reality image, the afforestation work (replanting work) of the worker 102 is supported, and the worker 102 can appropriately and efficiently perform the afforestation work.

[0116] As described with reference to FIG. 5, the controller 41 of the information terminal 4 includes the reality image acquisition unit 415, the augmented reality processing unit 416, and the display control unit 417. The reality image acquisition unit 415 acquires the reality image of the afforestation area 11 captured by the camera 44. The augmented reality processing unit 416 generates the augmented reality image (AR image) for supporting the afforestation work in the afforestation area 11. The display control unit 417 causes the display device 43 to display the AR image so that the AR image is superimposed on the reality image of the afforestation area 11.

[0117] The information terminal 4 includes the sensor system 48. The sensor system 48 detects the afforestation area 11 including at least the sapling 8. The sensor system 48 detects a state of the information terminal 4 (display device 43). The sensor system 48 includes the position sensor 45 and the motion sensor 47. The position sensor 45 detects the position of the information terminal 4. As the position sensor 45, a GNSS receiver that detects an absolute position of the information terminal 4 is exemplified. The motion sensor 47 detects the movement of the information terminal 4. Examples of the motion sensor 47 include an inertial sensor (IMU), an acceleration sensor, a gyro sensor, and a geomagnetic sensor. The motion sensor 47 may be a sensor in which at least two of an inertial sensor (IMU), an acceleration sensor, a gyro sensor, and a geomagnetic sensor are combined.

[0118] The camera 44 images at least an object that is in the afforestation area 11. A plurality of cameras 44 are provided in the information terminal 4. The camera 44 is provided, for example, on a left portion and a right portion of the information terminal 4.

[0119] FIG. 18 is a diagram illustrating an example of the reality image and the AR image displayed on the display device 43 of the information terminal 4 according to the embodiment. In the example illustrated in FIG. 18, the AR image includes the survival position symbol 151 indicating the survival position of the sapling 8 and the replanting position symbol 152 indicating the replanting position of the sapling 8. The survival position symbol 151 is displayed to be superimposed on the planting position of the reality image.  The replanting position symbol 152 is displayed to be superimposed on the replanting position of the reality image.  As described above, the afforestation position acquisition unit 411 acquires, from the replanting position specification unit 23 of the server 2, the planting position indicating the position of the sapling 8 planted in the afforestation area 11 and the replanting position indicating the position of the dead sapling 8 among the saplings 8 planted at the planting positions. The augmented reality processing unit 416 can generate the survival position symbol 151 and the replanting position symbol 152 as the AR image based on the planting position and the replanting position acquired by the afforestation position acquisition unit 411. One of the survival position symbol 151 and the replanting position symbol 152 may be displayed as the AR image on the display device 43.

[0120] FIG. 19 is a flowchart illustrating a method of generating display data including the AR image according to the embodiment. The reality image acquisition unit 415 acquires the reality image of the afforestation area 11 captured by the camera 44 (step SD1).

[0121] The augmented reality processing unit 416 generates the AR image including at least one of the survival position symbol 151 and the replanting position symbol 152 based on the survival position and the replanting position acquired by the afforestation position acquisition unit 411 and the position data and orientation data of the information terminal 4 (step SD2).

[0122] Since the information terminal 4 carried by the worker 102 is highly likely to move, the reality image captured by the camera 44 is a moving image. The augmented reality processing unit 416 generates the AR image to be superimposed on the reality image based on the movement of the information terminal 4 detected by the sensor system 48.

[0123] The display control unit 417 causes the display device 43 to display the display data generated such that the AR image is superimposed on the reality image (step SD3).

[0124] The AR image generated by the augmented reality processing unit 416 may include the above-described route image 16. The display control unit 417 may cause the display device 43 to display, as the AR image, display data obtained by superimposing, on the reality image, the route image 16 indicating a route of the worker 102 replanting the sapling 8 at each of the plurality of replanting positions. The AR image may include the non-completion symbol 1521 indicating the uncompleted position at which the sapling 8 is not completely replanted, or may include the completion symbol 1522 indicating the completed position at which the sapling 8 is completely replanted.

[0125] The AR image generated by the augmented reality processing unit 416 may include the above-described emphasized image 70. The display control unit 417 may cause the display device 43 to display, as the AR image, display data obtained by superimposing, on the reality image, the emphasized image 70 emphasizing the replanting position at which performance of the next replanting work is recommended among the plurality of replanting positions.

[0126] FIG. 20 is a diagram schematically illustrating AR glasses 140 according to the embodiment. The worker 102 may perform the afforestation work while wearing the so- called AR glasses 140. The AR glasses 140 are mounted on the head of the worker 102 who performs the afforestation work. When the worker 102 performs the afforestation work, an augmented reality image (AR image) for supporting the afforestation work is displayed in the AR glasses 140. The AR glasses 140 include a controller 141, a display device 143, a camera 144, and a sensor system 148.

[0127] The sensor system 148 detects an object that is in the afforestation area 11. The sensor system 148 detects a state of the AR glasses 140.  The sensor system 148 includes a position sensor and a motion sensor. The position sensor detects a position of the AR glasses 140. The motion sensor detects a movement of the AR glasses 140.

[0128] The camera 144 captures an image of an object that is in the afforestation area 11. A plurality of cameras 144 are provided. The cameras 144 are provided, for example, on a left portion and a right portion of the AR glasses 140.

[0129] The display device 143 is disposed in front of the eyes of the worker.  As illustrated in FIG. 20, the AR glasses 140 are mounted on the head of the worker 102 such that the display device 143 is located in front of the eyes of the worker 102. The display device 143 displays a reality image including the object that is in the afforestation area 11. The display device 143 is a transmissive type device. The front reality image transmitted through the transmissive display device 143 is displayed on the display device 143. The worker 102 can visually recognize the front reality image (outside world) through the transmissive type display device 143. The AR image is projected on the display device 143. The AR image is displayed on the display device 143 to be superimposed on the reality image. The worker 102 can visually recognize the reality image on which the AR image is superimposed.

[0130] The controller 141 generates the AR image for supporting the afforestation work. The controller 141 causes the display device 43 to display the AR image so that the AR image is superimposed on the reality image.

[0131] Since the head of the worker 102 wearing the AR glasses 140 moves, the image captured by the camera 144 is a moving image. The controller 141 generates the AR image to be superimposed on the image based on the movement of the AR glasses 140 detected by the sensor system 148.

[0132] FIG. 21 is a diagram illustrating an example of the reality image and the AR image displayed on the display device 143 of the AR glasses 140 according to the embodiment. The AR image may include, for example, an image indicating a procedure of the afforestation work. The AR image may include an image indicating a movement of the hand of the worker 102 performing the afforestation work.

[0133] In the example illustrated in FIG. 21, the reality image includes the sapling 8 and the afforestation tool 6. The reality image includes an image 103 of a hand of the worker 102 performing the afforestation work (replanting work) using the afforestation tool 6. The image 103 of the hand is an image (reality image) of the hand in real space.  The AR image is an image 104 indicating a movement of the hand as a standard of the worker 102. The image 104 is displayed on the display device 143 to be superimposed on the reality image. The image 104 is displayed on the display device 43 to be superimposed on the image 103.

[0134] In the example illustrated in FIG. 4, the image 104 is an image indicating the movement of the hand of the worker 102 when the afforestation work was performed in the past. A processor of the controller 141 acquires a past image that is an image indicating the movement of the hand of the worker 102 when the afforestation work was performed in the past. The past image is stored in a storage of the controller 141. The processor of the controller 141 acquires the past image from the storage. The past image may be stored in the server 2 located outside of the AR glasses 140. The controller 141 may acquire the past image from the server 2 via the communication system 5. The controller 141 generates the image 104 that is an AR image based on the past image.

[0135] The content and the procedure of the afforestation work in the past image are the same as the content and the procedure of the afforestation work by the worker 102 in the real space.

[0136] The worker 102 can move their hand so that the afforestation work is appropriately performed while visually recognizing the image 103 that is the reality image and the image 104 that is the AR image. Since the afforestation work can be performed with reference to the past movement of the hand of the worker 102, the worker can utilize their own advantages or find their own improvement points in the past afforestation work. The image 104 that is the AR image supports the afforestation work of the worker 102, and the worker 102 can appropriately and efficiently perform the afforestation work.

[0137] When the worker 102 is an unproficient worker, the image 104 may be an image indicating a movement of a hand of a proficient worker when the afforestation work is performed. The processor of the controller 141 acquires a proficient image which is the image indicating the movement of the hand of the proficient worker when the afforestation work is performed. The proficient image is stored in the storage of the controller 141. The processor of the controller 141 acquires the proficient image from the storage. The proficient image may be stored in the server 2 located outside of the AR glasses 140. The controller 141 may acquire the proficient image from the server 2 via the communication system 5. The controller 141 generates the image 104 that is the AR image based on the proficient image.

[0138] The content and the procedure of the afforestation work in the proficient image are the same as the content and the procedure of the afforestation work by the worker 102 in the real space.

[0139] The worker 102 can move their hand so that the afforestation work is appropriately performed while visually recognizing the image 103 that is the reality image and the image 104 that is the AR image. Since the afforestation work can be performed with reference to the movement of the hand of the proficient worker, the worker 102 can find their improvement points. The image 104 that is the AR image supports the afforestation work of the worker 102, and the worker 102 can appropriately and efficiently perform the afforestation work.

[0140] [Effects] As described above, the processor 10A of the server 2 includes the replanting position specification unit 23 that specifies the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11, the input data acquisition unit 25 that acquires the plant data regarding the sapling 8 at the replanting position, and the storage unit 27 that stores the management data in which the replanting position and the plant data are associated with each other.

[0141] According to the embodiment, since the plant data associated with the replanting position is registered in the storage unit 27, the replanting work is supported.  The worker 102 can recognize a situation of the replanting position by browsing the management data in which the replanting position and the plant data are associated with each other. Since the worker 102 can recognize the situation of the replanting position, the replanting work can be efficiently performed.

[0142] The display data generation unit 26 generates the display data including the management data. The worker 102 checking the display data can recognize the situation of the replanting position.

[0143] As described with reference to FIG. 16, when the registration symbol 71 is tapped, the designation data for designating the replanting position corresponding to the registration symbol 71 is generated. The display data generation unit 26 causes the display device 43 to display the plant data 72 associated with the designated replanting position based on the designation data for designating the replanting position. The designation data includes the identification number for identifying the replanting position (or the planting position). The display data generation unit 26 can cause the display device 43 to display the plant data 72 associated with the designated replanting position based on the designation data for designating the replanting position and the identification number. The worker 102 can check the plant data 72 associated with the replanting position by tapping the registration symbol 71.

[0144] The plant data 72 includes the image data of the dead sapling 8 captured by the camera 44. The worker 102 can visually recognize the situation of the replanting position by checking the image data.

[0145] The plant data includes the text data regarding the dead sapling 8 input from the input device 42. The worker 102 can recognize the situation of the replanting position by checking the text data.

[0146] The text data includes the reason for the death of the sapling 8. The worker 102 can recognize the reason for the death of the sapling 8 by checking the text data.

[0147] As described above, the processor of the controller 41 includes the afforestation position acquisition unit 411 that acquires the replanting position indicating the position of the dead sapling 8 among the plurality of saplings 8 planted in the afforestation area 11, the route calculation unit 413 that calculates the route of the worker 102 who performs the replanting of the sapling 8 at each of the plurality of replanting positions based on the replanting position, and the display control unit 417 that generates the display data including the route.

[0148] According to the embodiment, the replanting work is supported. Since the display data including the optimum route when the replanting is sequentially performed at the plurality of replanting positions is generated, the worker 102 can efficiently perform the replanting work while moving along the route.

[0149] The route calculation unit 413 calculates the route in the work area to which the plurality of replanting positions belong. Since the route calculation unit 413 calculates the route in the work area assigned to the worker 102, a calculation load decreases. The optimum route is calculated for each of the plurality of workers 102.

[0150] The route calculation unit 413 determines the start point of the route based on start point data for designating the start point of the route. The start point data includes the position data of the worker 102 detected by the position sensor 45. For example, by determining the start point of the route based on the current position of the worker 102, the worker 102 can immediately start the replanting work from the start point of the route. The start point data may be generated by operating the input device 42 of the information terminal 4. That is, the start point of the route may be determined by the worker 102 operating the input device 42 of the information terminal 4.

[0151] The storage area 12 where the sapling 8 to be replanted is located is provided in at least a part of the periphery of the afforestation area 11. The route calculation unit 413 determines one or both of the start point and the end point of the route based on the position of the work area and the position of the storage area 12. For example, by determining the start point of the route at a position close to the storage area in the work area, the worker 102 carrying out the basket 7 of the sapling 8 from the storage area 12 can start the replanting work immediately from the start point of the route after arriving at the work area. For example, when the end point of the route is determined at a position close to the storage area in the work area, the worker 102 ending the replanting work can immediately return to the storage area 12.

[0152] The route calculation unit 413 calculates the route so that the plurality of replanting positions are connected by the shortest distance in the work area. Since the route becomes short, a movement distance of the worker 102 decreases. Since the movement distance of the worker 102 decreases, a work load of the worker 102 is reduced.

[0153] The route calculation unit 413 calculates the route based on the topography of the work area. For example, the work load of the worker 102 is reduced by calculating the route to prevent the worker 102 from going up a steep slope.

[0154] When it is determined that the worker 102 deviates from the route based on the position of the worker 102 detected by the position sensor 45, the route calculation unit 413 recalculates the route. The worker 102 deviating from the route can return to the original route by recalculating the route.

[0155] Based on the position of the worker 102 detected by the position sensor 45, the route calculation unit 413 determines the replanting position at which performance of the next replanting work is recommended from the plurality of replanting positions. The display control unit 417 displays the recommended replanting position in a display form different from other replanting positions. The worker 102 can recognize the position at which the replanting is performed next by emphasizing and displaying the position at which the replanting work is performed next by the emphasized image 70.

[0156] The display control unit 417 causes the display device 43 to display the display data in which the replanting position symbol 152 indicating the replanting position and the worker symbol 14 indicating the position of the worker 102 detected by the position sensor 45 are superimposed on the route image 16 indicating the route. The worker 102 checking the display data can smoothly recognize a relationship among their own position, the replanting position, and the route.

[0157] The processor of the controller 41 includes the afforestation position acquisition unit 411 that acquires the replanting position indicating the position of the dead sapling 8 among the plurality of saplings 8 planted in the afforestation area 11, and the display control unit 417 that generates the display data including the replanting position symbol 152 indicating the replanting position and the worker symbol 14 indicating the position of the worker 102 detected by the position sensor 35.

[0158] According to the embodiment, the replanting work is supported. The worker 102 can recognize the relationship between their own position and the replanting position by checking the display data, and thus the replanting work can be efficiently performed.

[0159] As described above, the processor of the controller 41 includes the afforestation position acquisition unit 411 that acquires the replanting position indicating the position of the dead sapling 8 among the plurality of sapling 8 planted in the afforestation area 11, the completed position specification unit 414 that specifies the completed position indicating the replanting position at which the replanting of the sapling 8 is completed, and the display control unit 417 that generates the display data including the completed position.

[0160] According to the embodiment, the replanting work is supported. The worker 102 can recognize a progress status of the replanting work by checking the display data including the completed position at which the replanting work is completed. It is possible to prevent the worker 102 from erroneously returning to the completed position or erroneously planting the sapling 8 at the completed position despite the completion of the replanting. Therefore, the replanting work is efficiently performed.

[0161] The completed position specification unit 414 specifies the uncompleted position indicating the replanting position at which the replanting of the sapling 8 is not completed. The display control unit 417 generates the display data including the completion symbol 1522 indicating the completed position and the non-completion symbol 1521 indicating the uncompleted position. The worker 102 can recognize each of the completed position and the uncompleted position by checking the display data.

[0162] The processor of the controller 41 includes the route calculation unit 413 that calculates the route of the worker 102 replanting the sapling 8 at each of the plurality of replanting positions based on the replanting position. The display control unit 417 generates the display data including the completion symbol 1522, the noncompletion symbol 1521, and the route image 16 indicating the route. The worker 102 can recognize the relationship among the completed position, the uncompleted position, and the route by checking the display data. The display control unit 417 may cause the display device 43 to display only the route image 16 for the non-completion symbol 1521.

[0163] The completed position specification unit 414 determines whether the determination condition that the worker 102 stays at the replanting position for the prescribed time or more is satisfied based on the detection data of the position sensor 45 detecting the position of the worker 102, and specifies the replanting position as the completed position when it is determined that the determination condition is satisfied. Since the position of the worker 102 does not substantially change for the prescribed time in the replanting work of one sapling 8, the completed position specification unit 414 can determine whether the sapling 8 is replanted at the replanting position based on the detection data of the position sensor 45 detecting the position of the worker 102.

[0164] The completed position specification unit 414 determines whether the determination condition that the afforestation tool 6 stays at the replanting position for the prescribed time or more is satisfied based on the detection data of the position sensor 61 detecting the position of the afforestation tool 6, and specifies the replanting position as the completed position when it is determined that the determination condition is satisfied. Since the position of the afforestation tool 6 does not substantially change for the prescribed time in the replanting work of one sapling 8, the completed position specification unit 414 can determine whether the sapling 8 is replanted at the replanting position based on the detection data of the position sensor 61 detecting the position of the afforestation tool 6.

[0165] The completed position specification unit 414 specifies the replanting position as the completed position based on the operation signal generated when the operation member 62 of the afforestation tool 6 is operated. Since the operation of the operation member 62 of the afforestation tool 6 can be regarded as planting of the sapling 8 in the soil, the completed position specification unit 414 can determine whether the sapling 8 is replanted at the replanting position based on the detection data of the position sensor 61 detecting the position of the afforestation tool 6 and the operation signal from the operation member 62 of the afforestation tool 6.

[0166] As described above, the processor of the controller 41 includes the reality image acquisition unit 415 that acquires the reality image of the afforestation area 11 captured by the camera 44, the augmented reality processing unit 416 that generates the AR image for supporting the afforestation work in the afforestation area 11, and the display control unit 417 that causes the display device 43 to display the AR image to be superimposed on the reality image.

[0167] According to the embodiment, since the AR image for supporting the afforestation work is displayed on the display device 43 to be superimposed on the reality image, the afforestation work by the worker 102 is supported.

[0168] The afforestation system 1 includes the sensor system 48 that detects the state of the afforestation area 11 and the information terminal 4 (display device 43). The display control unit 417 positions the AR image on the reality image so that the AR image is superimposed on the reality image based on a relative position. The reality image and the AR image are superimposed and displayed based on the detection data of the sensor system 48.

[0169] The processor of the controller 41 includes the afforestation position acquisition unit 411 that acquires the survival position indicating the position of the sapling 8 that is not dead and the replanting position indicating the position of the dead sapling 8 among the saplings 8 planted in the planting positions in the afforestation area 11. The AR image includes at least one of the survival position symbol 151 indicating the survival position and the replanting position symbol 152 indicating the replanting position. The worker 102 can recognize whether the sapling 8 is alive in the real space by checking the display data displayed on the display device 43.

[0170] The AR image may include the route image 16 indicating the route of the worker performing the replanting of the sapling 8 at each of the plurality of replanting positions. The AR image may include the emphasized image 70 that emphasizes the replanting position at which performance of the next replanting work is recommended among the plurality of replanting positions. The worker 102 can efficiently perform the replanting work by checking the display data displayed on the display device 43.

[0171] The AR image may include the image indicating the procedure of the afforestation work. The AR image may include the image indicating the movement of the hand of the worker performing the afforestation work. For example, the unproficient worker 102 can also perform appropriate afforestation work while viewing the AR image by displaying the AR image indicating the procedure of the proficient worker and the AR image indicating the movement of the hand of the proficient worker on the display device 43.

[0172] [Other Embodiments] In the above-described embodiment, the functional unit of the server 2 may be configured by separate computers (hardware). The functional units of the controller 41 of the information terminal 4 may be configured by separate computers (hardware).

[0173] In the above-described embodiment, a part or all of the functional units of the server 2 may be provided in, for example, the controller 41 of the information terminal 4.  A part or all of the functional units of the controller 41 of the information terminal 4 may be provided in the server 2, for example. The controller 41 (processor) of the information terminal 4 may acquire the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11, acquire the plant data regarding the sapling 8 at the replanting position, and store the management data in which the sapling 8 and the plant data are associated with each other.

[0174] The controller 41 (processor) of the information terminal 4 may acquire the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11, calculate the route of the worker replanting the sapling 8 at each of the plurality of replanting positions based on the replanting position, and generate the display data including the route.

[0175] The controller 41 (processor) of the information terminal 4 may acquire the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11, calculate the route of the worker 102 replanting the sapling 8 at each of the plurality of replanting positions based on the replanting position, and generate the display data including the route.

[0176] The controller 41 (processor) of the information terminal 4 may acquire the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11, calculate the route of the worker 102 replanting the sapling 8 at each of the plurality of replanting positions based on the replanting position, and generate the display data including the route.

[0177] The controller 41 (processor) of the information terminal 4 may acquire the replanting position indicating the position at which the sapling 8 is to be replanted in the afforestation area 11, specify the completed position indicating the replanting position at which the replanting of the sapling 8 is completed, and generate the display data including the completed position.

[0178] The controller 41 (processor) of the information terminal 4 may acquire the reality image of the afforestation area 11 captured by the camera 44, generate the augmented reality image for supporting the afforestation work in the afforestation area 11, and cause the display device 43 to display the augmented reality image to be superimposed on the reality image.

[0179] When a communication environment of the afforestation area 11 is poor, communication between the information terminal 4 and the server 2 may be difficult. When the communication between the information terminal 4 and the server 2 is difficult, data sent from the first information terminal 4 may be received by the second information terminal 4 without passing through the server 2. Since all the functional units of the server 2 are provided in the controller 41 of the information terminal 4, the information terminal 4 can perform the processing described in the above embodiment. The first information terminal 4 and the second information terminal 4 may communicate with each other via a wireless local area network (LAN) such as Wifi (registered trademark). The first information terminal 4 and the second information terminal 4 may communicate with each other via a wireless personal area network (PAN) such as Bluetooth (registered trademark) or Zigbee (registered trademark). Reference Signs List

[0180] 1 AFFORESTATION SYSTEM 2  SERVER 3 AFFORESTATION MACHINE 4  INFORMATION TERMINAL 5 COMMUNICATION SYSTEM 6 AFFORESTATION TOOL 7  BASKET 8  SAPLING (PLANT) 9 MOVING BODY 10 COMPUTER 10A PROCESSOR 10B MAIN MEMORY 10C  STORAGE 10D INPUT / OUTPUT INTERFACE 10E COMMUNICATION INTERFACE 10F COMPUTER PROGRAM 11 AFFORESTATION AREA 12  STORAGE AREA 14 WORKER SYMBOL 15  SYMBOL 16 ROUTE IMAGE 17 WORK AREA IMAGE 18A FIRST BUTTON 18B SECOND BUTTON 19A NUMERICAL DATA 19B NUMERICAL DATA 19C NUMERICAL DATA 20 LEARNING DEVICE 21 PLANTING POSITION ACQUISITION UNIT 22 CAPTURED IMAGE ACQUISITION UNIT 23 REPLANTING POSITION SPECIFICATION UNIT 24 WORK AREA SETTING UNIT 5 25 INPUT DATA ACQUISITION UNIT 26 DISPLAY DATA GENERATION UNIT 27 STORAGE UNIT 31 VEHICLE BODY 32 TRAVELING DEVICE 10 33 PLANTING DEVICE 34 CONTROLLER 35 POSITION SENSOR 36 ARM 37 FRAME 15 38 HYDRAULIC CYLINDER 39 PLANTING UNIT 39A PLANT HOLDING PORTION 39B MAIN BODY PORTION 39C EXPANSION / CONTRACTION PORTION 20 41 CONTROLLER 42 INPUT DEVICE 43 DISPLAY DEVICE 44 CAMERA 45 POSITION SENSOR 25 47 MOTION SENSOR 48 SENSOR SYSTEM 61 POSITION SENSOR 62 OPERATION MEMBER 70 EMPHASIZED IMAGE 30 71 REGISTRATION SYMBOL 72 PLANT DATA 73 IMAGE DATA 74 REGISTRATION DATE DATA 75 TEXT DATA 5 91 92 93 100 CONTROLLER CAMERA POSITION SENSOR EMPLOYEE 10 101 102 103 104 140 MANAGER WORKER IMAGE IMAGE AR GLASSES 15 141 143 144 148 151 CONTROLLER DISPLAY DEVICE CAMERA SENSOR SYSTEM SURVIVAL POSITION SYMBOL 20 152 REPLANTING POSITION SYMBOL 152S START POINT SYMBOL 152E END POINT SYMBOL 411 AFFORESTATION POSITION ACQUISITION UNIT 412 WORK AREA ACQUISITION UNIT 25 413 414 415 416 417 ROUTE CALCULATION UNIT COMPLETED POSITION SPECIFICATION UNIT REALITY IMAGE ACQUISITION UNIT AUGMENTED REALITY PROCESSING UNIT DISPLAY CONTROL UNIT 1521 NON-COMPLETION SYMBOL 1522 COMPLETION SYMBOL

Claims

1. An afforestation system comprisinga processor,wherein the processoracquires a replanting position indicating a positionat which a plant is to be replanted in an afforestationarea,acquires plant data regarding the plant at thereplanting position, andstores management data in which the plant and the plant data are associated with each other.

2. The afforestation system according to claim 1, wherein, based on designation data for designating thereplanting position, the processorcauses a display device to display the plant dataassociated with the designated replanting position.

3. The afforestation system according to claim 1,wherein the plant data includes image data of theplant captured by a camera.

4. An information terminal comprisinga processor,wherein the processoracquires a replanting position indicating a position at which a plant is to be replanted in an afforestationarea,acquires plant data regarding the plant at thereplanting position, andstores management data in which the plant and the plant data are associated with each other.

5. The information terminal according to claim 4, wherein, based on designation data for designating thereplanting position, the processorcauses a display device to display the plant dataassociated with the designated replanting position.

6. The information terminal according to claim 4,wherein the plant data includes image data of the plant captured by a camera.

7. An afforestation system comprisinga processor, wherein the processor acquires a replanting position indicating a positionat which a plant is to be replanted in an afforestation area,calculates a route of a worker who replants the plant at each of a plurality of the replanting positions based on the replanting position, andgenerates display data including the route.

8. The afforestation system according to claim 7,wherein, based on a position of the worker detected bya position sensor, the processor recalculates the routewhen the processor determines that the worker deviates fromthe route.

9. The afforestation system according to claim 7, wherein the processor determines a replanting position at which performance of the next replanting work is recommended among the plurality of replanting positions based on a position of the worker detected by a position sensor, andcauses the recommended replanting position to bedisplayed in a display form different from other replantingpositions.

10. An afforestation system comprisinga processor,wherein the processoracquires a replanting position indicating a position of a dead plant among a plurality of plants planted in an afforestation area, andgenerates display data including a replanting position symbol indicating the replanting position and a workersymbol indicating a position of a worker detected by aposition sensor.

11. An information terminal comprisinga processor,wherein the processoracquires a replanting position indicating a position at which a plant is to be replanted in an afforestation area,calculates a route of a worker who replants the plant at each of a plurality of the replanting positions based on the replanting position, andgenerates display data including the route.

12. An afforestation system comprisinga processor,wherein the processoracquires a replanting position indicating a position at which a plant is to be replanted in an afforestation area,specifies a completed position indicating thereplanting position at which replanting of the plant iscompleted, and an uncompleted position indicating the replanting position at which replanting of the plant is notcompleted, andgenerates display data including a completion symbolindicating the completed position and a non-completionsymbol indicating the uncompleted position.

13. The afforestation system according to claim12,wherein the processordetermines whether a determination condition that a worker stays at the replanting position for a prescribedtime or more is satisfied, based on detection data of aposition sensor detecting a position of the worker, andspecifies the replanting position as the completed position when determining that the determination condition issatisfied.

14. The afforestation system according to claim12,wherein a worker replants the plant at the replanting position using an afforestation tool, andthe processordetermines whether a determination condition that the afforestation tool stays at the replanting position for a prescribed time or more is satisfied, based on detectiondata of a position sensor detecting a position of theafforestation tool, and specifies the replanting positionas the completed position when determining that the determination condition is satisfied.

15. The afforestation system according to claim12,wherein a worker replants the plant at the replanting position using an afforestation tool,the afforestation tool includes an operation member operated when the plant is replanted, andthe processorspecifies the replanting position as the completed position based on an operation signal generated when the operation member is operated.

16. An information terminal comprisinga processor,wherein the processoracquires a replanting position indicating a positionat which a plant is to be replanted in an afforestationarea,specifies a completed position indicating thereplanting position at which replanting of the plant iscompleted, and an uncompleted position indicating the replanting position at which replanting of the plant is notcompleted, andgenerates display data including a completion symbolindicating the completed position and a non-completionsymbol indicating the uncompleted position.

17. The information terminal according to claim16,wherein the processordetermines whether a determination condition that aworker stays at the replanting position for a prescribedtime or more is satisfied, based on detection data of aposition sensor detecting a position of the worker, andspecifies the replanting position as the completed positionwhen determining that the determination condition is satisfied.

18. The information terminal according to claim16,wherein a worker replants the plant at the replantingposition using an afforestation tool, andthe processordetermines whether a determination condition that the afforestation tool stays at the replanting position for a prescribed time or more is satisfied, based on detectiondata of a position sensor detecting a position of theafforestation tool, and specifies the replanting positionas the completed position when determining that the determination condition is satisfied.

19. An afforestation system comprisinga processor,wherein the processoracquires a reality image of an afforestation area captured by a camera,generates an augmented reality image for supporting afforestation work in the afforestation area, andcauses a display device to display the augmentedreality image to be superimposed on the reality image.

20. The afforestation system according to claim19, further comprisinga sensor system configured to detect a state of the display device,wherein, based on detection data of the sensor system, the processorpositions the augmented reality image on the realityimage such that the augmented reality image is superimposed on the reality image.

21. The afforestation system according to claim19,wherein the processoracquires, among plants planted at planting positions in the afforestation area, a survival position indicating aposition of a plant that is not dead and a replantingposition indicating a position of a dead plant, andthe augmented reality image includes at least one of a survival position symbol indicating the survival position and a replanting position symbol indicating the replanting position.

22. The afforestation system according to claim21,wherein the augmented reality image includes a route image indicating a route of a worker replanting the plant at each of a plurality of the replanting positions.

23. The afforestation system according to claim21,wherein the augmented reality image includes anemphasized image emphasizing the replanting position atwhich performance of the next replanting work isrecommended among a plurality of the replanting positions.

24. AR glasses comprisinga processor,wherein the processoracquires a reality image of an afforestation area,generates an augmented reality image for supporting afforestation work in the afforestation area, andcauses a display device to display the augmentedreality image to be superimposed on the reality image.

25. The AR glasses according to claim 24,further comprisinga sensor system configured to detect a state of the display device,wherein, based on detection data of the sensor system, the processorpositions the augmented reality image on the reality image such that the augmented reality image is superimposed on the reality image.

26. The AR glasses according to claim 24,wherein the processoracquires, among plants planted at planting positions in the afforestation area, a survival position indicating aposition of a plant that is not dead and a replantingposition indicating a position of a dead plant, andthe augmented reality image includes at least one of asurvival position symbol indicating the survival position and a replanting position symbol indicating the replanting position.

27. The AR glasses according to claim 26,wherein the augmented reality image includes a routeimage indicating a route of a worker replanting the plantat each of a plurality of the replanting positions.

28. The AR glasses according to claim 26,emphasized image emphasizing the replanting position at which performance of the next replanting work isrecommended among a plurality of the replanting positions.

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