Field management method, field management system, and field management program

Abstract

To support analysis of growth management for a user by determining a more accurate work region.SOLUTION: A method for managing a farm field includes estimating an estimation work region 410 in which it is estimated that a work device 30 has performed a first work, on the basis of positional information showing a position at each time of the work device 30, which performs the first work while moving in the farm field. The method for managing the farm field includes correcting the estimation work region 410 on the basis of similarity of the position and the shape between a registration work region 420 in which a second work was performed in the past and the estimation work region 410 in the farm field. Correcting the estimation work region 410 may include correcting the estimation work region 410 to the registration work region 420 on the basis of the similarity.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a farm field management method, a farm field management system, and a farm field management program. [Background technology]

[0002] Patent Document 1 (Japanese Patent No. 6946217) discloses a technique for estimating a work area in which a work vehicle has worked, based on position information of the work vehicle that has worked in a farm field. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6946217 Summary of the Invention [Problem to be solved by the invention]

[0004] The work area estimated by the technology disclosed in Patent Document 1 may not match the area where the work vehicle actually performed the work. For this reason, the user may correct the work area to a more accurate one. Also, if the work area is not corrected, it may be difficult to analyze the cultivation management because it does not match the area where the work was actually performed.

[0005] In view of the above situation, one of the objects of the present disclosure is to support a user in analyzing cultivation management by determining a more accurate working area. Other objects and novel features will become apparent from the description of this specification and the accompanying drawings. [Means for solving the problem]

[0006] The means for solving the problems will be explained below using the numbers used in the (Mode for carrying out the invention). These numbers are added to clarify the correspondence between the description in the (Claims) and the (Mode for carrying out the invention). However, these numbers should not be used to interpret the technical scope of the invention described in the (Claims).

[0007] A farm field management method according to one embodiment for achieving the above object includes estimating an estimated work area (410) in which a first task is estimated to have been performed by the task implement (30), based on position information indicating the position at each time of the task implement (30) moving within the farm field to perform a first task. The farm field management method also includes correcting the estimated work area (410) based on the similarity between the position and shape of the estimated work area (410) and a registered work area (420) in which a second task was previously performed in the farm field.

[0008] To achieve the above object, a farm land management system (1000) according to one embodiment includes an area estimation unit (150) and an area correction unit (160). The area estimation unit (150) estimates an estimated work area (410) in which a first work is estimated to have been performed by the work implement (30), based on position information indicating the position at each time of the work implement (30) moving within the farm land to perform a first work. The area correction unit (160) corrects the estimated work area (410) based on the similarity between the position and shape of the estimated work area (410) and a registered work area (420) in which a second work was previously performed in the farm land.

[0009] A farm field management program (310) according to one embodiment for achieving the above object causes the calculation device (120, 220) to estimate an estimated work area (410) in which a first work is estimated to have been performed by the work device (30), based on position information indicating the position at each time of the work device (30) moving within the farm field to perform a first work. The farm field management program (310) also causes the calculation device (120, 220) to correct the estimated work area (410) based on the similarity between the position and shape of the estimated work area (410) and a registered work area (420) in which a second work was previously performed in the farm field. Effect of the Invention

[0010] According to the above-described embodiment, the work of correcting the work area by the user is reduced, and the user can perform efficient analysis of cultivation management. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a farm land management system according to an embodiment. [Diagram 2] 3 is a diagram for explaining an estimated work area estimated by a farm land management device in one embodiment. FIG. [Diagram 3] FIG. 1 is a functional block diagram of a farm land management system according to an embodiment. [Figure 4] 4 is a flowchart showing a process of a farm land management system according to an embodiment. [Diagram 5] FIG. 13 is a diagram illustrating a sub-region that includes the outline of an estimated working area in one embodiment. [Figure 6] 11 is a diagram for explaining a small area including the outline of an estimated working area in the process of determining a degree of match according to one embodiment. FIG. [Figure 7] 11 is a diagram for explaining a small area including a registration work area in a process for determining a degree of match according to an embodiment. FIG. [Figure 8] FIG. 1 illustrates an estimated working area according to one embodiment. [Figure 9]FIG. 13 illustrates a registration workspace according to one embodiment. [Figure 10] FIG. 13 illustrates a small region including a contour in determining a degree of similarity in one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Embodiment 1) A farm land management system 1000 according to this embodiment of the present invention will be described with reference to the drawings. In this embodiment, as shown in Fig. 1, the farm land management system 1000 includes a farm land management device 100 and a terminal 200. The farm land management device 100 is communicatively connected to the terminal 200 and a work device 30 via a network 20, for example the Internet.

[0013] The working device 30 includes a positioning device, for example a GNSS (Global Navigation Satellite System) receiver, and acquires position information representing the position at each time. For example, the working device 30 acquires position information representing a position measured at one-second intervals. Therefore, the position information represents a position along the trajectory along which the working device 30 has moved. The working device 30 outputs the acquired position information to the farm land management device 100. The working device 30 includes devices that perform work in a farm field, such as a combine harvester that performs work alone, a tractor that performs work by towing a work machine, and a drone that sprays pesticides.

[0014] The farm land management apparatus 100 estimates an estimated work area representing an area in which the work device 30 is estimated to have performed work, based on the position information acquired by the work device 30. For example, the farm land management apparatus 100 estimates an estimated work area 410 based on the position information, as shown in Fig. 2. The farm land management apparatus 100 outputs area information representing the estimated work area 410 to the terminal 200.

[0015] Terminal 200 displays area information acquired from farm land management device 100. For example, terminal 200 displays an image showing estimated work area 410 on a map, as shown in Fig. 2. When estimated work area 410 differs from an actual work area that represents the area where work was actually performed, a user, for example, an operator, inputs a correction operation to input / output device 210 to correct estimated work area 410 to the actual work area. Even when work was performed in the same area, when estimated work area 410 estimated based on position information of work device 30 differs from the actual work area, the user needs to input a correction operation of estimated work area 410 to input / output device 210 each time.

[0016] For this reason, the farm field management apparatus 100 compares a previously registered work area 420, for example a work area previously modified by a user, with the estimated work area 410, and modifies the estimated work area 410. For example, when the estimated work area 410 is similar to the registered work area 420, the farm field management apparatus 100 modifies the estimated work area 410 to the area represented by the registered work area 420. The farm field management apparatus 100 outputs area information representing the modified work area, for example the area of ​​the registered work area 420, to the terminal 200.

[0017] In this way, the farm land management system 1000 reduces the work required to correct the estimated work area 410 and assists the user in registering the work area.

[0018] Furthermore, the farm land management apparatus 100 determines a work status related to the work performed by the work apparatus 30 in the work area, based on operation information indicating the state of the work apparatus 30. For example, the operation information includes position information of the work apparatus 30, and the farm land management apparatus 100 determines a movement path that the work apparatus 30 has moved in the work area. Furthermore, the farm land management apparatus 100 may determine a work type indicating the type of work performed by the work apparatus 30, such as planting, fertilizing, spraying pesticides, harvesting, etc., based on the operation information of the work apparatus 30. The farm land management apparatus 100 may determine an amount of work performed by the work apparatus 30, such as the planting amount, the amount of fertilizer or pesticide sprayed, the harvest amount, etc., based on the operation information of the work apparatus 30. The work information indicating the determined work status is output to the terminal 200 and displayed on the input / output device 210 of the terminal 200.

[0019] In this way, the farm land management system 1000 supports the user in analyzing cultivation management by notifying the user of the work status related to the work performed in the work area.

[0020] Here, the operation information of the working implement 30 is acquired by the working implement 30 and includes information indicating, for example, the speed, steering angle, engine RPM, and ON / OFF status of various clutches of the working implement 30. When the working implement 30 is a vehicle that tows a working machine, such as a tractor, the operation information may also include information such as the PTO (power take-off) RPM when transmitting power to the working machine, and the hitch height and lift arm angle that indicate the attitude of the working machine.

[0021] (Configuration of the farm management system) The configuration of the farm field management device 100 included in the farm field management system 1000 shown in Fig. 1 will be described. The farm field management device 100 includes an input / output device 110, a calculation device 120, a communication device 130, and a storage device 140. The farm field management device 100 is, for example, a computer. Information for the calculation device 120 to execute processing is input to the input / output device 110. The input / output device 110 outputs a result of the processing executed by the calculation device 120. The input / output device 110 includes various input devices and output devices, for example, a keyboard, a mouse, a microphone, a display, a speaker, a touch panel, and the like. The input / output device 110 may be omitted.

[0022] The communication device 130 is electrically connected to the network 20 and communicates with each device via the network 20. The communication device 130 transfers operation information acquired from the maintenance device 30 to the arithmetic device 120. The communication device 130 also transfers signals generated by the arithmetic device 120 to the terminal 200. The communication device 130 includes various interfaces, such as a network interface card (NIC) and a universal serial bus (USB).

[0023] The storage device 140 stores various data for determining the working area where the working device 30 has performed work, such as the field data 300, and the field management program 310. The storage device 140 is used as a non-transitory tangible storage medium for storing the field management program 310. The field management program 310 may be provided as a computer program product recorded on a computer-readable storage medium 1, or may be provided as a computer program product downloadable from a server.

[0024] The farm field data 300 stores one or more registered work areas 420 registered as areas where work has been performed in the past, and work information indicating the status of work performed in the registered work areas 420. The registered work areas 420 indicate, for example, areas where the estimated work area 410 estimated by the farm field management device 100 in the past has been revised by a user.

[0025] The arithmetic device 120 reads out and executes the farm land management program 310 from the storage device 140, and performs various data processing to determine the working area in which the working device 30 has performed work. For example, the arithmetic device 120 includes a central processing unit (CPU) and the like.

[0026] The arithmetic device 120 reads and executes the farm field management program 310, thereby realizing an area estimation unit 150, an area correction unit 160, a work status determination unit 170, and an output unit 180, as shown in Fig. 3. The area estimation unit 150 estimates an estimated work area 410 in which work is estimated to have been performed by the work device 30, based on the operation information of the work device 30. The area correction unit 160 determines a corrected work area by correcting the estimated work area 410, based on the registered work area 420 in the farm field data 300 and the estimated work area 410. The work status determination unit 170 determines a work status related to the work performed by the work device 30, based on the operation information of the work device 30. The output unit 180 outputs work information indicating the corrected work area and the work status to the terminal 200.

[0027] Next, the configuration of the terminal 200 will be described. As shown in FIG. 1, the terminal 200 includes an input / output device 210, a calculation device 220, a communication device 230, and a storage device 240. The terminal 200 includes, for example, a computer, a tablet, a mobile phone, and the like. Information for the calculation device 220 to execute processing is input to the input / output device 210. In addition, the input / output device 210 outputs the result of the calculation device 220 executing the processing. The input / output device 210 includes various input devices and output devices, and includes, for example, a keyboard, a mouse, a microphone, a display, a speaker, a touch panel, and the like.

[0028] The communication device 230 is electrically connected to the network 20 and communicates with each device via the network 20. The communication device 230 transfers signals acquired from the farm land management device 100 to the arithmetic device 220. The communication device 230 also transfers signals generated by the arithmetic device 220 to the farm land management device 100. The communication device 230 includes various interfaces, such as a transceiver used for wireless communication such as a wireless LAN (Local Area Network) or a cellular network, a NIC (Network Interface Card), and a USB (Universal Serial Bus).

[0029] The storage device 240 stores various data, such as a display program 320, for displaying work information showing the work status of the work performed by the work device 30. The storage device 240 is used as a non-transitory tangible storage medium for storing the display program 320. The display program 320 may be provided as a computer program product recorded in a computer-readable storage medium 2, or may be provided as a computer program product downloadable from a server.

[0030] The arithmetic device 220 reads and executes the display program 320 to implement the display unit 250 in cooperation with the input / output device 210, as shown in Fig. 3. The display unit 250 acquires work information from the farm land management device 100, and displays the acquired work information on the input / output device 210.

[0031] (Farm management system operation) When the working device 30 shown in Fig. 1 performs work in a field, it transmits operation information to the arithmetic device 120 of the field management apparatus 100. For example, when the engine is stopped, the working device 30 transmits operation information from when the engine is started to when it is stopped to the arithmetic device 120 of the field management apparatus 100. When the arithmetic device 120 receives the operation information from the working device 30, it reads and executes a field management program 310. When the field management program 310 is read and executed, the arithmetic device 120 starts the process shown in Fig. 4, which is a field management method.

[0032] In step S110, the area estimation unit 150 realized by the calculation device 120 estimates an estimated working area 410 in which the working device 30 is estimated to have performed work, based on the position information of the working device 30. For example, the area estimation unit 150 estimates a convex hull for the position represented in the position information of the working device 30 as the estimated working area 410. The convex hull represents the smallest area that includes all positions. The estimated working area 410 may also represent an area obtained by expanding the outline of the convex hull outward by the working width of the working device 30. The working width of the working device 30 is registered in advance by the working device 30. For example, the working width represents the distance from the position of the device provided on the working device 30 to the edge of the area in which the working device 30 performs work in the width direction of the working device 30. The working width represents the distance from the position of the device provided on the working device 30 to the edge of the area in which the working device performs work in the width direction of the working device 30 when the tractor pulls the agricultural machine. Furthermore, area estimation section 150 may estimate a concave hull corresponding to the position represented in the position information of working device 30 as estimated working area 410.

[0033] In step S120, the area correction unit 160 determines small areas to divide the field where the work has been performed by the work implement 30 in order to determine a similarity indicating the degree of similarity between the position and shape of the registered work area 420 in the field data 300 and the estimated work area 410. For example, as shown in FIG. 5, the small area 400 represents an area divided into a first line 401 extending in a first direction and a second line 402 extending in a second direction different from the first direction. The second direction may or may not be perpendicular to the first direction. Note that the work type of the work previously performed in the registered work area 420 may be different from or the same as the work type of the work performed in the estimated work area 410.

[0034] In step S130 shown in FIG. 4, area modification unit 160 determines a degree of match representing the degree of similarity between registered working area 420 and estimated working area 410. For example, the degree of match represents the similarity between the contour of registered working area 420 and the contour of estimated working area 410. For example, area modification unit 160 determines small area 415 including the contour of estimated working area 410. Similarly, area modification unit 160 determines small area including the contour of registered working area 420. Area modification unit 160 determines the degree of match based on the number of matches representing the quantity of small areas including the contour of estimated working area 410 and the contour of registered working area 420.

[0035] For example, the degree of agreement may represent the number of matches with respect to the quantity of small regions 400 that include either the contour of the estimated working area 410 or the contour of the registered working area 420. For example, as shown in FIG. 6, the small region 415 that includes the contour of the estimated working area 410 includes the filled second small region 400-2, the third small region 400-3, the fourth small region 400-4, and the like. Also, as shown in FIG. 7, the small region that includes the contour of the registered working area 420 includes the filled first small region 400-1, the second small region 400-2, the third small region 400-3, the fourth small region 400-4, the fifth small region 400-5, and the like. In this case, the quantity of small regions 400 that include at least either the contour of the estimated working area 410 or the contour of the registered working area 420 is 17. Furthermore, the number of small areas 400 that include both the contour of the estimated working area 410 and the contour of the registered working area 420 is 11. Therefore, the area correction unit 160 determines the degree of match between the estimated working area 410 and the registered working area 420 to be 11 / 17.

[0036] 4, area modification unit 160 compares the determined degree of agreement with a predetermined threshold value to determine whether or not to modify estimated working area 410. For example, when the degree of agreement is greater than the threshold value, area modification unit 160 proceeds to processing of step S150 to modify estimated working area 410. When the degree of agreement is equal to or less than the threshold value, area modification unit 160 proceeds to processing of step S160 without modifying estimated working area 410.

[0037] In step S150, area correction unit 160 corrects estimated work area 410 based on registered work area 420. For example, it has been confirmed that registered work area 420 represents an area worked on by a user using work device 30. Therefore, area correction unit 160 corrects estimated work area 410 to a corrected work area representing the area of ​​registered work area 420.

[0038] In step S160, the work status determination unit 170 determines a work status related to the work performed by the work apparatus 30, based on the operation information of the work apparatus 30. For example, the work status determination unit 170 determines a movement route taken by the work apparatus 30, based on position information included in the operation information. For example, the work status determination unit 170 determines, as the movement route of the work apparatus 30, a line connecting positions represented in the position information in the order in which the positions were measured.

[0039] For example, the work status determination unit 170 determines the work type of the work performed by the operating device 30 based on the operation information. For example, the work status determination unit 170 estimates the work type using a trained model obtained by machine learning. In this case, the trained model is trained to determine the work type from the operation information. The work status determination unit 170 may also determine the work type based on the model of the operating device 30. In this case, the storage device 140 stores work correspondence data that associates the model of the operating device 30 with the work type. The work status determination unit 170 determines the work type based on the work correspondence data.

[0040] The work situation determination unit 170 stores work information associating the determined work situation with the estimated work area 410 in the field data 300. Furthermore, when the estimated work area 410 has been corrected to a corrected work area, the work situation determination unit 170 stores work information associating the determined work situation with the corrected work area in the field data 300.

[0041] In step S170, the output unit 180 outputs the work information stored in the field data 300 to the terminal 200. The work information to be output may be a portion of the information stored in the field data 300, or may be all of the information stored in the field data 300.

[0042] In step S180, the display unit 250 of the terminal 200 displays the work information acquired from the output unit 180 of the farm land management apparatus 100. For example, the display unit 250 displays an image showing the corrected work area on a map. The display unit 250 may also display the work status of the work performed in the corrected work area in association with the corrected work area shown on the map.

[0043] The user can check the work area that is close to the actual work area and the work status in that work area without correcting the work area determined by the farm land management system 1000, for example, the corrected work area. When the work area shown in the image differs from the actual work area in which the work was actually performed, the user may input a correction operation to the input / output device 210 to correct the work area.

[0044] (Modification) The configuration described in the embodiment is an example, and the configuration can be changed to the extent that the function is not impaired. For example, in step S140 shown in FIG. 4, the area correction unit 160 may determine an area including either the estimated working area 410 or the registered working area 420 as the corrected working area. For example, as shown in FIG. 8, the area estimation unit 150 may estimate an estimated working area 410 that does not include the upper left and lower right areas of the field area. In this case, it is assumed that the field data 300 stores information representing a registered working area 420 that does not include the upper right and lower left areas of the field area, as shown in FIG. 9. In this case, when a part of the estimated working area 410 is not included in the registered working area 420, a part of the registered working area 420 is not included in the estimated working area 410, and the estimated working area 410 is similar to the registered working area 420, the area correction unit 160 may determine an integrated area 430 that includes either the estimated working area 410 or the registered working area 420 as the corrected working area.

[0045] 4, the area correction unit 160 may determine the degree of similarity representing the similarity between the registered working area 420 and the estimated working area 410 by any method. For example, the area correction unit 160 may determine the degree of match representing the similarity based on the number of matches representing the quantity of small areas 400 including the estimated working area 410 and the registered working area 420. In this case, the degree of match may represent the number of matches for the quantity of small areas 400 including either the estimated working area 410 or the registered working area 420.

[0046] Here, a small area 400 including an estimated working area 410 refers to a small area 400 in which the ratio of the area of ​​the estimated working area 410 included in the small area 400 to the area of ​​the small area 400 is greater than a threshold value. Also, a small area 400 including an estimated working area 410 may refer to a small area 400 that includes even a small amount of the estimated working area 410. Similarly, a small area 400 including a registration working area 420 refers to a small area 400 in which the ratio of the area of ​​the registration working area 420 included in the small area 400 to the area of ​​the small area 400 is greater than a threshold value. Also, a small area 400 including a registration working area 420 may refer to a small area 400 that includes even a small amount of the registration working area 420.

[0047] Furthermore, when determining the degree of coincidence between the contour of the estimated working area 410 and the contour of the registered working area 420, the area correction unit 160 may determine a small area 400 including the contour of the estimated working area 410 based on a small area 400 including the estimated working area 410. For example, the area correction unit 160 may determine, among the small areas 400 including the estimated working area 410, a small area 400 adjacent to a small area 400 that does not correspond to the small area 400 including the estimated working area 410, as a small area 400 including the contour of the estimated working area 410. Similarly, the area correction unit 160 may determine a small area 400 including the contour of the registered working area 420 based on a small area 400 including the registered working area 420. For example, the area correction unit 160 may determine a small area 400 that is adjacent to a small area 400 that does not correspond to the small area 400 that includes the registration work area 420 as the small area 400 that includes the contour of the registration work area 420.

[0048] 10, when determining the degree of agreement between the contour of the estimated working area 410 and the contour of the registered working area 420, the area correction unit 160 may expand the contour sub-area 400 used when determining the degree of agreement to a contour sub-area 500 including the contour and a sub-area 400 adjacent to the contour sub-area 500. For example, the area correction unit 160 may expand the contour sub-area 400 used when determining the degree of agreement to a contour sub-area 500 including the contour and a first extended sub-area 510 sharing the contour of the contour sub-area 500. Furthermore, the area correction unit 160 may expand the contour sub-area 400 used when determining the degree of agreement to a contour sub-area 500 including the contour, the first extended sub-area 510, and a second extended sub-area 520 sharing the vertices of the contour sub-area 500. The region correction section 160 may further expand the small region 400 of the contour used when determining the degree of match, to a small region 400 adjacent to the first expanded small region 510 .

[0049] Furthermore, the area correction section 160 may expand the small area 400 of the contour to both the contour of the estimated working area 410 and the contour of the registered working area 420, or to either one of them.

[0050] The area correction unit 160 may also determine the degree of match based on the number of matches representing the quantity of small areas 400 that include at least a portion of the estimated working area 410, such as a vertex of the contour, and at least a portion of the registered working area 420, such as a vertex of the contour.

[0051] The above-described embodiment and modified examples are merely examples, and the configurations described in each embodiment and modified example may be arbitrarily changed and / or arbitrarily combined as long as the functions are not impaired. Furthermore, some of the functions described in the embodiment and modified examples may be omitted as long as the necessary functions can be realized. For example, the farm field management system 1000 shown in FIG. 1 may not include the terminal 200. For example, the farm field management apparatus 100 may output work information to a terminal outside the farm field management system 1000 and display the work information on the terminal. Furthermore, all or part of the processing of the farm field management apparatus 100 may be executed by the terminal 200. Furthermore, all or part of the processing of the terminal 200 may be executed by the farm field management apparatus 100. Furthermore, the farm field management program 310 may include a display program 320. [Explanation of symbols]

[0052] 1, 2 Storage medium 20 Network 30 Work Equipment 100 Farm field management device 110 I / O Devices 120 Arithmetic equipment 130 Communication Equipment 140 Storage device 150 Area estimation part 160 Area correction part 170 Work status determination unit 180 Output section 200 terminals 210 I / O device 220 Arithmetic equipment 230 Communication Equipment 240 Storage device 250 Display section 300 Field Data 310 Field Management Program 320 Display Program 400 small areas 401 1st straight line 402 Second straight line 410 Estimated work area 420 Registration workspace 430 Integrated Area 500 Contour Small Areas 510 First Extended Sub-area 520 Second Extended Sub-area 1000 Farm Management System

Claims

1. estimating, by an area estimation unit, an estimated work area in which the first work is estimated to have been performed by the work device, based on position information representing a position at each time of the work device that moves within the farm field to perform the first work; when a similarity between a position and a shape of a registered work area in which a second work was previously performed in the field and the estimated work area is greater than a threshold, correcting the estimated work area by an area correction unit; Including, The larger the similarity is, the more similar the position and shape of the registered work area and the estimated work area are. Field management methods.

2. revising the estimated working space When the similarity is greater than the threshold, modifying the estimated working area to a modified working area that represents the registered working area. The farmland management method according to claim 1, further comprising:

3. revising the estimated working space When the degree of similarity is greater than the threshold, the estimated working area is modified to a modified working area that represents an area included in either the estimated working area or the registered working area. The farmland management method according to claim 1, further comprising:

4. A field management method according to any one of claims 1 to 3, wherein the similarity is determined based on a number of matches representing the quantity of small areas that include at least a portion of the estimated work area and at least a portion of the registered work area when an area including the field is divided into small areas.

5. The farm land management method according to claim 4 , wherein the degree of similarity represents the number of matches with respect to the quantity of small areas including at least a part of the estimated work area or at least a part of the registered work area.

6. determining a work status of the first work performed by the work device based on operation information indicating a state of the work device at each time by a work status determination unit; outputting, by an output unit, task information in which the task status is associated with a region obtained by correcting the estimated task region; The farm land management method according to claim 1 , further comprising:

7. an area estimation unit that estimates an estimated work area in which a first task is estimated to have been performed by a working device based on position information that indicates a position at each time of the working device that moves within a farm field to perform the first task; an area correction unit that corrects the estimated work area when a similarity between a position and a shape of a registered work area in which a second work has been performed in the field in the past and the estimated work area is greater than a threshold value; Equipped with The larger the similarity is, the more similar the position and shape of the registered work area and the estimated work area are. Field management system.

8. estimating an estimated work area in which the first work is estimated to have been performed by a work device based on position information indicating a position at each time of the work device that moves within a farm field to perform the first work; correcting the estimated work area when a similarity between a position and a shape of a registered work area in which a second work was previously performed in the field and the estimated work area is greater than a threshold value; and causing a computing device to execute the following: The larger the similarity is, the more similar the position and shape of the registered work area and the estimated work area are. Field management programs.

Images