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

Abstract

To support efficient cultivation management by a user.SOLUTION: A farm field management method includes calculating an inclined area 451 representing an area size of a farm field 400 corresponding to an inclination of the farm field 400. Also, the farm field management method includes calculating an evaluation value representing a relation between evaluation of work performed on the farm field 400 and the inclined area 451. Further, the farm field management method includes outputting evaluation information representing the evaluation value. The calculation of the inclined area 451 can include calculating the inclined area 451 on the basis of an altitude difference 440 in the farm field, and a horizontal projection area 431 of the farm field 400. Also, the calculation of the inclined area 451 can include calculating, in each of a plurality of small regions 460 obtained by dividing the farm field 400, an inclined area 451B of the small region 460 corresponding to an inclination of the small region 460, and calculating the inclined area 451 of the farm field 400 on the basis of the calculated inclined area 451B of the small region 460.SELECTED DRAWING: Figure 8

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] There are disclosed technologies for measuring the slope of a farm field and controlling a work implement using the measured slope. For example, Patent Document 1 discloses a technology for using a drone to calculate the slope of the destination where the work implement will move, and controlling the work implement to keep it level based on the calculated slope.

[0003] Furthermore, Patent Document 2 discloses that a work implement equipped with a positioning device moves within a field to perform work, thereby measuring the height of the field and generating an elevation difference map showing the elevation difference of the field. This elevation difference map is used to control the work implement. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6384848 [Patent Document 2] Japanese Patent Publication No. 2020-28224 Summary of the Invention [Problem to be solved by the invention]

[0005] The technologies described in Patent Documents 1 and 2 only use the elevation difference in the field to control the implements, and do not take into consideration the use of this information for cultivation management. In recent years, the area of ​​the field has been plotted on a map, the area of ​​the field on a horizontal plane has been calculated, and evaluation values ​​such as yield per unit area have been calculated based on the calculated area.

[0006] However, if the field is sloping, the area of ​​the ground surface of the field differs from the area on a horizontal plane, and therefore the evaluation value related to the area differs from the actual evaluation value, which may prevent the user from performing a highly accurate analysis and efficient cultivation management.

[0007] In view of the above circumstances, one of the objects of the present disclosure is to support efficient cultivation management by users. Other objects can be understood from the following description and explanation of the embodiments. [Means for solving the problem]

[0008] The following describes the means for solving the problems using the numbers and symbols used in the description of the invention. These numbers and symbols are added in parentheses for reference purposes to show an example of the correspondence between the claims and the description of the invention. Therefore, the claims should not be interpreted as being limited by the parenthetical descriptions.

[0009] To achieve the above object, a farm field management method according to one embodiment includes calculating a slope area (451) representing the area of ​​the farm field (400) according to the slope of the farm field (400). The farm field management method also includes calculating an evaluation value representing the relationship between an evaluation of work performed in the farm field (400) and the slope area (451). The farm field management method also includes outputting evaluation information representing the evaluation value.

[0010] To achieve the above object, a field management method according to one embodiment includes calculating a gradient representing the gradient of a plurality of fields (400). The field management method also includes classifying the plurality of fields (400) into a group of sloping fields (470) according to the gradient. The field management method also includes displaying the group of sloping fields (470) in a distinguishable manner on the same screen.

[0011] To achieve the above object, a farmland management system (1000) according to one embodiment includes an area calculation unit (165), an evaluation calculation unit (170), and an output unit (175). The area calculation unit (165) calculates a slope area (451) representing the area of ​​the farmland (400) according to the slope of the farmland (400). The evaluation calculation unit (170) calculates an evaluation value representing the relationship between the evaluation of work performed in the farmland (400) and the slope area (451). The output unit (175) outputs evaluation information representing the evaluation value.

[0012] To achieve the above object, a farm land management system (1000) according to one embodiment includes a slope calculation unit (160) and a display unit (250). The slope calculation unit (160) calculates the slope of a plurality of farm fields (400). The display unit (250) classifies the plurality of farm fields (400) according to the slope and displays, on the same screen, a group of sloping farm fields (470) in a distinguishable manner.

[0013] To achieve the above object, a farm field management program (310) according to one embodiment causes the arithmetic device (120, 220) to calculate a slope area (451) representing the area of ​​the farm field (400) according to the slope of the farm field (400). The farm field management program (310) also causes the arithmetic device (120, 220) to calculate an evaluation value representing the relationship between an evaluation of work performed in the farm field (400) and the slope area (451). The farm field management program (310) also causes the arithmetic device (120, 220) to output evaluation information representing the evaluation value.

[0014] To achieve the above object, a field management program (310) according to one embodiment causes the computing device (120, 220) to calculate a gradient representing the gradient of a plurality of fields (400). The field management program (310) also causes the computing device (120, 220) to classify the plurality of fields (400) into a group of sloping fields (470) according to the gradient. The field management program (310) also causes the computing device (120, 220) to display the group of sloping fields (470) in a distinguishable manner on the same screen. [Effects of the Invention]

[0015] According to the above embodiment, the user can efficiently manage cultivation. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram of a farm land management system according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating a configuration of farm field data according to an embodiment. [Figure 3] FIG. 2 is a diagram illustrating a farm field displayed by a terminal in one embodiment. [Figure 4] FIG. 2 is a diagram illustrating multiple fields displayed by a terminal in one embodiment. [Figure 5] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 6] FIG. 1 is a perspective view of a farm field according to an embodiment. [Figure 7] FIG. 2 is a diagram illustrating functional blocks executed by a farm land management system according to an embodiment. [Figure 8] 1 is a flowchart showing a process performed by a farm land management system according to an embodiment. [Figure 9] FIG. 2 is a diagram for explaining small areas obtained by dividing a farm field in one embodiment. [Figure 10] FIG. 2 is a diagram illustrating a cross section of a small region according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] (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 an operating device 30 via a network 20, for example, the Internet. The operating device 30 includes farm work vehicles such as a harvester, a tractor that pulls a harvester, a fertilizer applicator, and a pesticide sprayer.

[0018] The farm land management device 100 has farm land data 300 that stores information about the farm land where the work device 30 performs work. As shown in Fig. 2, the farm land data 300 includes evaluation values ​​that evaluate the work performed in the farm land, such as the yield of the harvested crop, the harvesting time that indicates the time required for the harvesting work, and the yield that indicates the yield per unit area, and is used for cultivation management by the user.

[0019] Generally, information represented by the farm field data 300, such as yield, is calculated based on the area of ​​the farm field when it is projected onto a horizontal plane (hereinafter referred to as the horizontal projected area). However, as shown in Fig. 3, the farm field 400 may have a maximum position 401 where the altitude is the maximum value and a minimum position 402 where the altitude is the minimum value, and may be inclined relative to the horizontal. In this case, the actual area of ​​the farm field 400 along the ground surface is larger than the horizontal projected area.

[0020] Therefore, the farmland management system 1000 calculates the yield per unit area according to the slope of the farmland 400 and displays the calculated yield in the evaluation display area 500. The user can check the yield per unit area according to the slope, which is more accurate than the yield based on the horizontal projection area. This allows the user to manage cultivation based on a more accurate evaluation value.

[0021] The farm land management system 1000 displays an image that clearly shows altitude-divided regions 410, which are obtained by dividing the farm land 400 according to altitude. One altitude-divided region 410 represents, for example, a region whose altitude falls within a predetermined range. For example, a first altitude-divided region 410-1 represents a region whose altitude is greater than a first threshold. A second altitude-divided region 410-2 represents a region whose altitude is equal to or less than the first threshold and greater than a second threshold. A third altitude-divided region 410-3 represents a region whose altitude is equal to or less than the second threshold.

[0022] Furthermore, the farm land management system 1000 displays on one screen a group of sloping fields 470, which are obtained by classifying multiple farm fields 400 according to their slope, as shown in Fig. 4. The user can easily compare the slope of the farm field 400 with the evaluation value, and perform a detailed analysis. (Configuration of the farm management system) The configuration of the farmland management device 100 included in the farmland management system 1000 shown in Fig. 1 will be described. The farmland management device 100 includes an input / output device 110, a calculation device 120, a communication device 130, and a storage device 140. The farmland management device 100 is, for example, a computer. Information used by the calculation device 120 to execute processing is input to the input / output device 110. The input / output device 110 also outputs the results of processing executed by the calculation device 120. The input / output device 110 includes various input and output devices, such as a keyboard, a mouse, a microphone, a display, a speaker, and a touch panel. The input / output device 110 may be omitted.

[0023] Communication device 130 is electrically connected to network 20 and communicates with each device via network 20. For example, communication device 130 transfers operation information acquired from maintenance device 30, such as position information of maintenance device 30 at each time, to arithmetic device 120. Communication device 130 also transfers signals generated by arithmetic device 120 to terminal 200. Communication device 130 includes various interfaces, such as a network interface card (NIC) and a universal serial bus (USB).

[0024] The storage device 140 stores various data, such as the field data 300, for calculating the slope of the field 400 and an evaluation value that takes the slope of the field 400 into account, and the field management program 310. The storage device 140 is used as a non-transitory tangible storage medium that stores 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 that can be downloaded from a server.

[0025] 2, the field data 300 stores various information related to a plurality of fields 400. For example, the field data 300 stores the field name, field area, slope area, slope degree, and evaluation value of the plurality of fields 400. The field area indicates the position, shape, altitude, etc. of the field 400.

[0026] The inclination represents the inclination of the field 400. For example, as shown in Fig. 5, the inclination is determined based on a horizontal projection distance 430 from a maximum position 401, which has the greatest altitude, to a minimum position 402, which has the smallest altitude, in the field 400, and an altitude difference 440 between the maximum position 401 and the minimum position 402. For example, the inclination represents the ratio of the altitude difference 440 to the horizontal projection distance 430, and may be expressed as 1% when the horizontal projection distance 430 is 100 m and the altitude difference 440 is 1 m. Here, the horizontal projection distance 430 represents the distance from the maximum position 401 to the minimum position 402 on a horizontal plane.

[0027] The slope area represents the area taking into account the slope of the field 400, and has a value closer to the actual area of ​​the field 400 along the ground surface than the horizontal projection area. For example, as shown in FIGS. 5 and 6, the slope area 451 represents the area of ​​the field 400 projected vertically onto a slope 450 that passes through the maximum position 401 and the minimum position 402. The slope 450 represents, for example, a plane that approximates the ground surface 420. As shown in FIG. 6, the slope area 451 has a value closer to the area of ​​the field 400 on the ground surface 420 than the horizontal projection area 431. Here, the horizontal projection area 431 represents the area of ​​the field 400 projected vertically onto a horizontal plane.

[0028] The evaluation value represents an evaluation of the work performed in the field 400, and includes, for example, the yield, the harvesting time representing the time required for harvesting, the yield per unit area representing the yield, and the harvested area per unit time. Here, the evaluation value per unit area, such as the yield per unit area or the harvesting time per unit area, represents an evaluation value that takes into account the slope of the field 400, such as the ratio of the slope area 451 to the evaluation value for the entire field 400. For example, the yield per unit area represents the ratio of the yield of the field 400 to the slope area 451, and is calculated by dividing the yield of the field 400 by the slope area 451. Furthermore, the harvested area per unit time represents the ratio of the slope area 451 to the harvesting time, and is calculated by dividing the slope area 451 by the harvesting time.

[0029] 1 executes the farm field management program 310 and is used for various data processing operations to calculate the slope of the farm field 400 and an evaluation value based on the slope of the farm field 400. For example, the computing device 120 includes a central processing unit (CPU) and the like.

[0030] By reading and executing the field management program 310, the arithmetic device 120 realizes a data storage unit 150, a height division unit 155, a slope calculation unit 160, an area calculation unit 165, an evaluation calculation unit 170, and an output unit 175, as shown in FIG. 7. The data storage unit 150 stores field data 300. The height division unit 155 calculates height-divided areas 410 by dividing the field 400 according to height. The slope calculation unit 160 calculates the slope of the field 400. The area calculation unit 165 calculates the slope area 451 of the field 400, as shown in FIG. 6. The evaluation calculation unit 170 calculates an evaluation value taking into account the slope of the field 400.

[0031] Next, the configuration of the terminal 200 will be described. As shown in Fig. 1, the terminal 200 includes an input / output device 210, an arithmetic device 220, a communication device 230, and a storage device 240. The terminal 200 includes, for example, a computer, a tablet, a mobile phone, etc. Information used by the arithmetic device 220 to execute processing is input to the input / output device 210. The input / output device 210 also outputs the results of processing executed by the arithmetic device 220. The input / output device 210 includes various input devices and output devices, such as a keyboard, a mouse, a microphone, a display, a speaker, and a touch panel.

[0032] The communication device 230 is electrically connected to the network 20 and communicates with each device via the network 20. For example, the communication device 230 transfers information 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 network interface card (NIC) and a universal serial bus (USB).

[0033] The storage device 240 stores various data, such as a display program 320, for displaying information about the field 400, such as the slope and evaluation values. 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 on a computer-readable storage medium 2, or may be provided as a computer program product downloadable from a server.

[0034] The arithmetic device 220 reads and executes the display program 320, thereby working in cooperation with the input / output device 210 to realize the display unit 250 as shown in Fig. 7. The display unit 250 acquires information about the field 400 from the field management device 100 and displays the acquired information.

[0035] (Operation of farmland management device) When the arithmetic device 120 of the farm land management apparatus 100 acquires information about the farm field 400, it reads and executes the farm land management program 310. By executing the farm land management program 310, the arithmetic device 120 executes the processing shown in Fig. 8, which is a farm land management method.

[0036] In step S110, the data storage unit 150 realized by the calculation device 120 acquires information about the field 400. For example, the data storage unit 150 acquires operation information acquired from the work device 30. Based on the acquired operation information, the data storage unit 150 calculates information about the field 400, such as the area of ​​the field 400 and an evaluation value.

[0037] The operation information includes information that indicates the operating state of the implement 30 when work is being performed in the field 400, and includes information that indicates, for example, the speed, steering angle, engine RPM, the ON / OFF status of various clutches, the position information of the implement 30 at each time, the work period, etc. When the implement 30 is a vehicle that tows a work 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 work machine, and the hitch height and lift arm angle that indicate the attitude of the work machine.

[0038] The operation information also includes position information of the work device 30. The work device 30 is equipped with a positioning device, for example, a GNSS (Global Navigation Satellite System) receiver, and acquires position information, for example, latitude, longitude, and altitude, that indicates the position of the work device 30 at each time it moves.

[0039] The data storage unit 150 determines the area of ​​the field 400 where the work device 30 has performed work, based on the position information of the work device 30. For example, the area of ​​the field 400 is represented by any closed figure, such as a polygon or rectangle, that includes the position represented by the acquired position information. For example, the field 400 is represented by a figure that surrounds all of the acquired position information. Furthermore, the data storage unit 150 acquires the altitude at each position in the field 400, based on the position information of the work device 30.

[0040] The data storage unit 150 may also determine an evaluation value for the work performed by the work device 30 based on the operation information. For example, when the evaluation value includes the yield, a yield sensor provided on the work device 30 measures the yield of the crop harvested in the field 400. The measured yield is transmitted to the data storage unit 150 of the farmland management apparatus 100 as operation information. When the evaluation value includes the harvesting work time, the data storage unit 150 calculates the work time during which the work device 30 worked in the field 400 based on the time information included in the position information. For example, the work time represents the time from when the work device 30 enters the field 400 to when it leaves. The work period may also represent the time from when the engine of the work device 30 starts to when it stops. The determined evaluation values, for example, the yield and the harvesting work time, are stored in the farmland data 300. The evaluation value may also be acquired from a device other than the work device 30. For example, a measuring device installed in a harvest facility may measure the yield of a harvested crop and transmit information indicating the measured yield to the farm land management apparatus 100.

[0041] In step S120, the altitude dividing unit 155 divides the field 400 according to altitude and calculates altitude divided regions 410. As shown in Fig. 3, one altitude divided region 410 represents, for example, a region where the altitude is within a predetermined range. For example, the first altitude divided region 410-1 represents a region where the altitude is greater than a first threshold. The second altitude divided region 410-2 represents a region where the altitude is equal to or less than the first threshold and greater than a second threshold. The third altitude divided region 410-3 represents a region where the altitude is equal to or less than the second threshold.

[0042] The first and second thresholds are set in advance and may be set by the user or may be fixed values. The altitude division unit 155 may further have one or more thresholds, such as a third threshold, to divide the field 400 into four or more areas. The differences between adjacent thresholds may be equal to or different from each other. For example, when the third threshold is smaller than the second threshold, the difference between the first and second thresholds may be the same as or different from the difference between the second and third thresholds.

[0043] In step S130 shown in Fig. 8, the slope calculation unit 160 calculates the slope of the field 400 based on the area information of the field 400. For example, first, the slope calculation unit 160 detects a maximum position 401 with the highest altitude and a minimum position 402 with the lowest altitude in the field 400, as shown in Fig. 3. For example, the slope calculation unit 160 detects the position represented by the position information with the highest altitude among the position information of the working device 30 as the maximum position 401. Furthermore, the slope calculation unit 160 detects the position represented by the position information with the lowest altitude among the position information of the working device 30 as the minimum position 402.

[0044] Next, the inclination calculation unit 160 calculates the degree of inclination based on the altitude difference 440 between the maximum position 401 and the minimum position 402 and the horizontal projection distance 430 between the maximum position 401 and the minimum position 402. As shown in FIG. 5 , the inclination calculation unit 160 calculates the altitude difference 440 by subtracting the altitude of the minimum position 402 from the altitude of the maximum position 401. The inclination calculation unit 160 also calculates the distance from the maximum position 401 to the minimum position 402 on the horizontal plane as the horizontal projection distance 430. The inclination degree is calculated by dividing the calculated altitude difference 440 by the horizontal projection distance 430. The calculated inclination degree is recorded in the farm field data 300.

[0045] In step S140 shown in FIG. 8 , the area calculation unit 165 calculates the slope area 451 based on the calculated slope and the horizontal projection area 431. For example, as shown in FIG. 6 , the area calculation unit 165 calculates the area of ​​the field 400 on a horizontal plane as the horizontal projection area 431. For example, the area calculation unit 165 first calculates the trajectory on the horizontal plane along which the task implement 30 moves while working in the field 400, based on the position information of the task implement 30 at each time. The trajectory on the horizontal plane is calculated, for example, based on the latitude and longitude indicated in the position information of the task implement 30. Next, the area calculation unit 165 calculates the area of ​​the work area where work is performed when the task implement 30 moves along the trajectory on the horizontal plane as the horizontal projection area 431. For example, the work area represents the area occupied by the trajectory on the horizontal plane having a work width set for each task implement 30. The work width represents the distance in a direction perpendicular to the direction of travel of the area where work is performed when the task implement 30 moves.

[0046] The area calculation unit 165 calculates the slope ratio of the distance between the maximum position 401 and the minimum position 402 on the sloped surface 450 to the horizontal projection distance 430 shown in FIG. 5 based on the slope degree. The slope area 451 is calculated by multiplying the calculated slope ratio by the horizontal projection area 431. The slope ratio may be calculated using the elevation difference 440 and the horizontal projection distance 430 based on Pythagoras' theorem. The calculated slope area 451 is recorded in the field data 300.

[0047] In step S150 shown in FIG. 8 , the evaluation calculation unit 170 calculates an evaluation value that takes into account the slope of the field 400, based on the slope area 451. Specifically, the evaluation calculation unit 170 calculates an evaluation value that represents the relationship between the slope area 451 and the evaluation of the work done on the field 400. For example, the evaluation calculation unit 170 calculates a yield that represents the ratio of the slope area 451 to the yield in the field 400. The ratio of the yield to the slope area 451 may be calculated as the yield. The evaluation calculation unit 170 may also calculate an evaluation value that represents the ratio of the slope area 451 to the harvesting work time in the field 400. The evaluation calculation unit 170 may calculate an evaluation value that represents the ratio of the slope area 451 to the work time done on the field 400, for example, the harvesting work time. The calculated evaluation value is recorded in the field data 300.

[0048] 8, the output unit 175 outputs evaluation information indicating the evaluation value of the field 400 and inclination information indicating the inclination of the field 400 to the terminal 200, based on the field data 300. The inclination information also includes information indicating the highly divided areas 410.

[0049] In step S170, the display unit 250 of the terminal 200 displays the evaluation information and the inclination information on the input / output device 210. As shown in Fig. 3, the display unit 250 acquires information representing the highly-divided regions 410 from the inclination information, and displays an image on a map in which the highly-divided regions 410, into which the field 400 is divided according to altitude, are identifiable. For example, the display unit 250 displays an image on the map in which the first highly-divided region 410-1, the second highly-divided region 410-2, and the third highly-divided region 410-3 are represented in different colors.

[0050] The display unit 250 may also display the boundary between the first highly-divided region 410-1 and the second highly-divided region 410-2, and the boundary between the second highly-divided region 410-2 and the third highly-divided region 410-3. The boundary between the first highly-divided region 410-1 and the second highly-divided region 410-2 may be displayed as a line connecting positions having a first threshold altitude that divides the first highly-divided region 410-1 and the second highly-divided region 410-2, such as a contour line. The boundary between the second highly-divided region 410-2 and the third highly-divided region 410-3 may be displayed as a line connecting positions having a second threshold altitude that divides the second highly-divided region 410-2 and the third highly-divided region 410-3. This allows the user to easily check the slope of the field 400.

[0051] The display unit 250 displays the evaluation information of the field 400 in the evaluation display area 500. The evaluation display area 500 may display multiple evaluation values, such as yield, unit yield, harvesting time, and harvesting time per unit area. The display unit 250 may also display a list of the fields 400 and the corresponding evaluation information in a table format. This allows the user to check the highly accurate evaluation value according to the slope of the field 400.

[0052] 4, the display unit 250 may display an image showing the regions of multiple fields 400 on a map on the same screen. The display unit 250 may classify the multiple fields 400 into one or more sloping field groups 470 according to the slope. For example, the display unit 250 classifies fields 400 whose slope is greater than a first threshold as a first sloping field group 470-1. The display unit 250 classifies fields 400 whose slope is equal to or less than the first threshold and greater than a second threshold as a second sloping field group 470-2. The display unit 250 classifies fields 400 whose slope is equal to or less than the second threshold as a third sloping field group 470-3.

[0053] The first and second thresholds are set in advance and may be set by the user or may be fixed values. The display unit 250 may further include one or more thresholds, such as a third threshold, to classify the farm field 400 into four or more categories. The difference between adjacent thresholds may be equal to or different from each other. For example, when the third threshold is smaller than the second threshold, the difference between the first and second thresholds may be the same as or different from the difference between the second and third thresholds.

[0054] The display unit 250 displays an image on the input / output device 210 that clearly shows the classified sloping field groups 470. For example, the display unit 250 displays an image on a map in which the first sloping field group 470-1, the second sloping field group 470-2, and the third sloping field group 470-3 are shown in different colors. This allows the user to easily understand the differences in slope among the multiple fields 400. Furthermore, the user can compare the evaluation information of the multiple fields 400 with the slopes of the multiple fields 400 to perform an analysis according to the slope of the field 400.

[0055] In this way, the farm land management system 1000 displays evaluation information and area information according to the slope of the farm field 400, thereby assisting the user in managing cultivation.

[0056] (Variation) The configuration described in the embodiment is an example, and the configuration can be changed as long as the functionality is not impaired. For example, information indicating the altitude of the field 400 may be acquired from a device other than the work device 30. For example, the data storage unit 150 may acquire altitude information of the field 400 from an aircraft that measures the altitude of the ground surface 420, such as a drone. In this case, the aircraft measures the altitude of the ground surface 420 in the field 400 and transmits altitude information indicating the measured altitude to the farmland management device 100. The data storage unit 150 may also acquire altitude information that has already been measured, such as altitude information measured by the Geospatial Information Authority of Japan.

[0057] As shown in FIG. 9 , the inclination calculation unit 160 may calculate the inclination of multiple small regions 460 obtained by dividing the field 400. The small regions 460 may be determined by any method, for example, by being surrounded by line segments parallel to latitude lines and line segments parallel to longitude lines. Alternatively, the small regions 460 may be formed by polygons whose vertices 461 are position information acquired by the work implement 30. In this case, the inclination calculation unit 160 detects, for each small region 460, a maximum position 401B having the highest altitude and a minimum position 402B having the lowest altitude, as shown in FIG. 10 . Next, the inclination calculation unit 160 calculates the inclination of the small region 460 based on the altitude difference 440B between the maximum position 401B and the minimum position 402B and the horizontal projection distance 430B between the maximum position 401B and the minimum position 402B. The calculated inclination of each small region 460 is output to the terminal 200 by the output unit 175 as inclination information. The display unit 250 of the terminal 200 displays on the map the gradient of each small area 460 in a distinguishable manner. This allows the user to check the difference in gradient within the field 400.

[0058] The slope area 451 represents an area corresponding to the slope of the field 400 and may be calculated by any method. For example, as shown in FIG. 9 , the area calculation unit 165 may calculate the area corresponding to the slope of each of a plurality of small regions 460 obtained by dividing the field 400, and calculate the slope area 451 based on the calculated area of ​​each small region 460. The small region 460 may be determined by any method, and may be determined, for example, so as to be surrounded by line segments parallel to latitude lines and line segments parallel to longitude lines, or may be formed by a polygon having vertices 461 that are position information acquired by the working device 30. For example, when the small region 460 is formed by a triangle having three vertices 461 that are the position information of the working device 30 (for example, information having latitude, longitude, and altitude), the area of ​​the small region 460 is calculated as the area of ​​the triangle in a plane that passes through the three vertices 461. The slope area 451 is calculated by adding up the areas of the calculated small regions 460 .

[0059] In this case, as shown in FIG. 10 , the area calculation unit 165 first determines, in each small region 460, a slope 450B that passes through a maximum position 401B where the altitude is the maximum value and a position 402B where the altitude is the minimum value, and that approximates the ground surface 420. The slope 450B may be a plane that passes through at least three of the vertices 461 of the small region 460. Next, the area calculation unit 165 calculates the area of ​​the small region 460 projected vertically onto the determined slope 450B as the slope area 451B. Finally, the area calculation unit 165 calculates the slope area 451 of the field 400 based on the slope areas 451B of each small region 460. For example, the area calculation unit 165 calculates the slope area 451 of the field 400 by adding up the slope areas 451B of each small region 460.

[0060] The area calculation unit 165 calculates the slope area 451 that approximates the area of ​​the ground surface 420 by using the slope area 451B in the small region 460 obtained by dividing the field 400. This allows the user to confirm an evaluation value with high accuracy.

[0061] The inclination degree may be expressed by any method that can represent the inclination of the field 400. For example, the inclination calculation unit 160 may calculate the inclination degree of the field 400 based on the inclination area 451 and the horizontal projection area 431 shown in Fig. 6. For example, the inclination calculation unit 160 may calculate the ratio of the inclination area 451 to the horizontal projection area 431 as the inclination degree.

[0062] The above-described embodiments and modifications are merely examples. The configurations described in each embodiment and modification may be modified and / or combined as desired without impairing functionality. Furthermore, some of the functions described in the embodiments and modifications may be omitted as long as the necessary functionality is achieved. For example, some or all of the processing performed by the farm field management apparatus 100 may be performed by the terminal 200. Furthermore, some or all of the processing performed by the terminal 200 may be performed by the farm field management apparatus 100. For example, some of the processing performed in step S170 may be performed by the output unit 175 of the farm field management apparatus 100. For example, the output unit 175 may classify multiple farm fields 400 into one or more sloping field groups 470 based on the slope. Information representing the classified sloping field groups 470 is output to the terminal 200 by the output unit 175.

[0063] Furthermore, some of the processing of the farm land management device 100 may be omitted. For example, the altitude dividing unit 155 may be omitted, and the processing of step S120 shown in Fig. 8 may be omitted. In this case, the display unit 250 of the terminal 200 does not display the altitude divided areas 410 into which the farm land 400 is divided according to altitude.

[0064] Also, the inclination calculation unit 160 may be omitted, and step S130 shown in Fig. 8 may be omitted. In this case, the area calculation unit 165 may calculate the inclination ratio of the distance between the maximum position 401 and the minimum position 402 on the inclined surface 450 to the horizontal projection distance 430 shown in Fig. 5, without using the inclination degree. Also, the display unit 250 of the terminal 200 may not need to display the inclination degree.

[0065] Furthermore, the area calculation unit 165 and the evaluation calculation unit 170 may be omitted. In this case, the display unit 250 of the terminal 200 does not need to display the evaluation value according to the slope of the field 400. [Explanation of symbols]

[0066] 1, 2: Storage medium 20: Network 30: Work equipment 100: Field management device 110: Input / output device 120: Arithmetic device 130: Communication equipment 140: Storage device 150: Data storage unit 155: Altitude division part 160: Inclination calculation unit 165:Area calculation part 170: Evaluation calculation unit 175: Output section 200: Terminal 210: Input / output device 220: Arithmetic device 230:Communication equipment 240: Storage device 250:Display section 300: Field data 310: Field Management Program 320: Display program 400: Field 401: Maximum position 402 :Minimum position 410: Advanced division area 420: Ground surface 430: Horizontal projection distance 431: Horizontal projected area 440: Altitude difference 450: Inclined surface 451: Slope area 460 :Small area 461: Vertex 470: Sloping fields 500: Rating display area 1000: Field management system

Claims

1. Calculating a slope area representing an area of ​​the field according to the slope of the field; calculating an evaluation value representing a relationship between an evaluation of the work performed in the field and the slope area; outputting evaluation information representing the evaluation value; Including, The evaluation value represents an evaluation of the task according to the slope. Field management methods.

2. Calculating the slope area includes: Calculating the slope area based on the elevation difference within the field and the horizontal projection area of ​​the field. The farmland management method according to claim 1, comprising:

3. Calculating a slope area representing an area of ​​the field according to the slope of the field; calculating an evaluation value representing a relationship between an evaluation of the work performed in the field and the slope area; outputting evaluation information representing the evaluation value; Including, Calculating the slope area includes: calculating a gradient representing the gradient of the field based on a difference between a maximum value of altitude and a minimum value of altitude within the field and a horizontal projection distance from a maximum position where the altitude is the maximum value to a minimum position where the altitude is the minimum value; Calculating the slope area based on the slope and the horizontal projection area of ​​the field; A field management method including:

4. Calculating the slope area includes: calculating a slope area of ​​each of a plurality of small areas obtained by dividing the farm field, the slope area corresponding to the slope of the small area; Calculating a slope area of ​​the field based on the calculated slope area of ​​the small region; The farmland management method according to claim 1, comprising:

5. The evaluation value is expressed as a ratio between the slope area and the evaluation, and represents the evaluation taking into account the slope of the field. The farmland management method according to any one of claims 1 to 4.

6. The evaluation represents the ratio of the slope area to the work time of the work performed in the field. The farmland management method according to any one of claims 1 to 5.

7. The evaluation represents the ratio of the yield in the field to the slope area. The farmland management method according to any one of claims 1 to 6.

8. and outputting area information representing altitude-divided areas obtained by dividing the field according to altitude. The farmland management method according to any one of claims 1 to 7.

9. an area calculation unit that calculates a slope area that represents the area of ​​the field according to the slope of the field; an evaluation calculation unit that calculates an evaluation value that represents a relationship between an evaluation of the work performed in the field and the slope area; an output unit that outputs evaluation information representing the evaluation value; Equipped with The evaluation value represents an evaluation of the task according to the slope. Field management system.

10. A display unit that displays the evaluation information The farmland management system according to claim 9, further comprising:

11. Calculating a slope area representing an area of ​​the field according to the slope of the field; calculating an evaluation value representing a relationship between an evaluation of the work performed in the field and the slope area; outputting evaluation information representing the evaluation value; causing a computing device to execute The evaluation value represents an evaluation of the task according to the slope. Field management program.

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