JP2023031375A - Farm field management method, farm field management system, and farm field management program - Google Patents

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

The present invention relates to an agricultural field management method, an agricultural field management system, and an agricultural field management program.

A technique for measuring the slope in a field and using the measured slope to control a working device is disclosed. For example, Patent Literature 1 discloses a technique of using a drone to calculate the inclination of a destination to which a work device moves, and controlling the work device to keep it horizontal based on the calculated tilt.

Further, in Patent Document 2, a working device equipped with a positioning device moves in a field to perform work, measures the height of the field, and generates a height difference map representing the height difference of the field. is disclosed. This height difference map is used for controlling the working device.

Japanese Patent No. 6384848 JP 2020-28224 A

The techniques described in Patent Literatures 1 and 2 only use the height difference of the field for controlling the working device, and do not consider using it for cultivation management. In recent years, an area of a field is represented on a map, the area of the field on the horizontal plane is calculated, and an evaluation value such as yield per unit area is calculated based on the calculated area.

However, when the field is sloping, the area of the ground surface of the field is different from the area on the horizontal plane. Therefore, since the evaluation value related to the area is different from the actual evaluation value, the user may not be able to perform highly accurate analysis and may not be able to perform efficient cultivation management.

In view of the above situation, 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 the description of the embodiments.

Means for solving the problems will be described below using the numbers and symbols used in the mode for carrying out the invention. These numbers and symbols are added in parentheses for reference in order to show an example of correspondence between the description of the claims and the mode for carrying out the invention. Therefore, the claims should not be construed as limiting by the parenthesized description.

A farm field management method according to one embodiment for achieving the above object includes calculating a slope area (451) representing the area of a farm field (400) according to the slope of the farm field (400). The field management method also includes calculating an evaluation value representing the relationship between the evaluation of work performed in the field (400) and the slope area (451). Furthermore, the field management method includes outputting evaluation information representing the evaluation value.

A farm field management method according to one embodiment for achieving the above object includes calculating a slope representing a slope of a plurality of farm fields (400). The field management method also includes classifying the plurality of fields (400) into a sloped field group (470) according to the degree of slope. Furthermore, the farm field management method includes displaying the group of sloping farm fields (470) separately on the same screen.

An agricultural field management system (1000) according to one embodiment for achieving the above object comprises an area calculation unit (165), an evaluation calculation unit (170), and an output unit (175). The area calculator (165) calculates a slope area (451) representing the area of the field (400) according to the slope of the field (400). An evaluation calculation unit (170) calculates an evaluation value representing the relationship between the evaluation of the work performed in the field (400) and the slope area (451). An output unit (175) outputs evaluation information representing an evaluation value.

An agricultural field management system (1000) according to one embodiment for achieving the above object includes an inclination calculator (160) and a display (250). A slope calculator (160) calculates slopes representing slopes of a plurality of fields (400). The display unit (250) distinguishes and displays on the same screen an inclined farm field group (470) in which a plurality of farm fields (400) are classified according to the degree of inclination.

An agricultural field management program (310) according to an embodiment for achieving the above object calculates a sloped area (451) representing the area of the agricultural field (400) according to the slope of the agricultural field (400). 120, 220) is executed. In addition, the farm field management program (310) causes the calculation device (120, 220) to calculate the evaluation value representing the relationship between the evaluation of the work performed in the farm field (400) and the slope area (451). . Furthermore, the agricultural field management program (310) causes the arithmetic units (120, 220) to output evaluation information representing evaluation values.

An agricultural field management program (310) according to one embodiment for achieving the above object causes arithmetic devices (120, 220) to calculate the degree of inclination representing the inclination of a plurality of agricultural fields (400). In addition, the farm field management program (310) causes the computing devices (120, 220) to classify the plurality of farm fields (400) into a group of inclined farm fields (470) according to the degree of inclination. Furthermore, the farm field management program (310) causes the computing devices (120, 220) to display the group of inclined farm fields (470) separately on the same screen.

According to said form, the user can manage cultivation efficiently.

It is a schematic diagram of an agricultural field management system in one embodiment. It is a figure showing the structure of the agricultural field data in one embodiment. In one embodiment, it is a figure showing an agricultural field displayed by a terminal. In one embodiment, it is a figure showing a plurality of farm fields displayed by a terminal. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3; It is a perspective view of an agricultural field in one embodiment. It is a figure showing the functional block which the agricultural field management system in one embodiment performs. It is a flow chart showing processing by an agricultural field management system in one embodiment. It is a figure for demonstrating the small area|region which divided|segmented the agricultural field in one embodiment. It is a figure showing the cross section of the small area|region in one embodiment.

(Embodiment 1)
A field management system 1000 according to this embodiment of the present invention will be described with reference to the drawings. In the present embodiment, an agricultural field management system 1000 includes an agricultural field management device 100 and a terminal 200, as shown in FIG. The agricultural field management device 100 is communicably connected to the terminal 200 and the work device 30 via the network 20, for example, the Internet. The work device 30 includes, for example, agricultural work vehicles such as a harvester, a tractor that pulls the harvester, a fertilizer, and a pesticide.

The farm field management device 100 has farm field data 300 that stores information about the farm field where the working device 30 works. The field data 300, as shown in FIG. 2, includes evaluation values for evaluating the work performed in the field, such as the yield of the harvested crop, the harvesting work time representing the time required for the harvesting work, and the yield per unit area. It includes the unit yield to be expressed, etc., and is used for cultivation management by the user.

In general, the information represented by the field data 300, for example, the unit yield, is calculated based on the area of the field when projected onto a horizontal plane (hereinafter referred to as horizontal projection area). However, as shown in FIG. 3, the field 400 may have a maximum altitude 401 where the altitude is the maximum value and a minimum altitude 402 where the altitude is minimum, and may be inclined with respect to the horizontal. In this case, the actual area along the ground surface of field 400 is larger than the horizontally projected area.

Therefore, the agricultural field management system 1000 calculates the yield according to the slope of the agricultural field 400 and displays the calculated yield in the evaluation display area 500 . The user can check the yield according to the slope, which is more accurate than the yield based on the horizontal projection area. Thereby, the user can perform cultivation management based on more accurate evaluation values.

The agricultural field management system 1000 displays an image identifiably representing the altitude division areas 410 obtained by dividing the agricultural field 400 according to the altitude. One altitude division area 410 represents, for example, an area whose altitude is included in a predetermined range. For example, first altitude segmented region 410-1 represents a region whose altitude is greater than a first threshold. A second altitude division area 410-2 represents an area whose altitude is equal to or less than the first threshold and greater than the second threshold. A third altitude division area 410-3 represents an area whose altitude is equal to or lower than the second threshold.

In addition, as shown in FIG. 4, the agricultural field management system 1000 displays, on one screen, an inclined agricultural field group 470 in which a plurality of agricultural fields 400 are classified according to the inclination. The user can easily compare the slope of the field 400 and the evaluation value, and can perform detailed analysis.
(Configuration of field management system)
The configuration of the agricultural field management device 100 included in the agricultural field management system 1000 shown in FIG. 1 will be described. The agricultural field management device 100 includes an input/output device 110 , an arithmetic device 120 , a communication device 130 and a storage device 140 . The agricultural field management device 100 is, for example, a computer. Input/output device 110 receives input of information for arithmetic device 120 to execute processing. The input/output device 110 also outputs the result of the processing executed by the arithmetic device 120 . The input/output device 110 includes various input devices and output devices, such as keyboards, mice, microphones, displays, speakers, and touch panels. Input/output device 110 may be omitted.

The communication device 130 is electrically connected to the network 20 and communicates with each device via the network 20 . For example, the communication device 130 transfers operation information acquired from the work device 30 , for example, position information of the work device 30 at each time, to the arithmetic device 120 . Also, the signal generated by the arithmetic device 120 is transferred to the terminal 200 . The communication device 130 includes various interfaces such as NIC (Network Interface Card) and USB (Universal Serial Bus).

The storage device 140 stores various data for calculating the degree of inclination of the farm field 400 and the evaluation value based on the inclination of the farm field 400 , such as the farm field data 300 and the farm 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 the computer-readable storage medium 1, or may be provided as a computer program product downloadable from a server.

The farm field data 300 stores various information about a plurality of farm fields 400, as shown in FIG. For example, the field data 300 stores field names, field regions, slope areas, slope degrees, and evaluation values of a plurality of fields 400 . The farm field area represents the position, shape, altitude, and the like of the farm field 400 .

The degree of inclination represents the inclination of the field 400 . For example, as shown in FIG. 5, the degree of inclination is, for example, the horizontal projection distance 430 from the maximum position 401 with the highest altitude to the minimum position 402 with the lowest altitude, and the altitude between the maximum position 401 and the minimum position 402. A determination is made based on the difference 440 . For example, slope may represent the ratio of elevation difference 440 to horizontal projection distance 430, and may be expressed as 1% when horizontal projection distance 430 is 100 m and elevation 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 the horizontal plane.

The slope area represents the area based on the slope of the farm field 400, and has a value closer to the actual area along the ground surface of the farm field 400 than the horizontal projection area. For example, as shown in FIGS. 5 and 6, the sloped area 451 represents the area of the agricultural field 400 projected vertically onto the sloped surface 450 passing through the maximum position 401 and the minimum position 402 . Sloped surface 450 represents a plane that approximates the ground surface 420, for example. As shown in FIG. 6, the slope area 451 has a value closer to the area of the agricultural field 400 on the ground surface 420 than the horizontal projected area 431 does. Here, the horizontal projection area 431 represents the area of the agricultural field 400 projected in the vertical direction onto the horizontal plane.

The evaluation value represents the evaluation of the work performed in the field 400, and includes, for example, the yield, the harvesting work time representing the work time required for the harvesting work, the yield per unit area, the harvested area per unit time, and the like. include. Here, the evaluation value per unit area, for example, the yield per unit area, the harvesting work time per unit area, etc. is the evaluation value based on the slope of the field 400, for example, the ratio between the slope area 451 and the evaluation value for the entire field 400. show. For example, the unit yield represents the ratio of the yield of the field 400 to the sloped area 451 and is calculated by dividing the yield of the field 400 by the sloped area 451 . The harvested area per unit time represents the ratio of the sloped area 451 to the harvested work time, and is calculated by dividing the sloped area 451 by the harvested work time.

The computing device 120 shown in FIG. 1 is used for various data processing for executing the farm field management program 310 and calculating the slope of the farm field 400 and the evaluation value based on the slope of the farm field 400 . For example, the arithmetic unit 120 includes a central processing unit (CPU) and the like.

By reading and executing the agricultural field management program 310, the arithmetic device 120, as shown in FIG. 170 and an output unit 175 are realized. The data storage unit 150 stores field data 300 . The altitude dividing unit 155 calculates altitude divided areas 410 obtained by dividing the agricultural field 400 according to the altitude. The slope calculator 160 calculates the slope of the farm field 400 . The area calculation unit 165 calculates an inclined area 451 of the field 400 as shown in FIG. The evaluation calculator 170 calculates an evaluation value based on the slope of the field 400 .

Next, the configuration of terminal 200 will be described. The terminal 200 includes an input/output device 210, an arithmetic device 220, a communication device 230, and a storage device 240, as shown in FIG. Terminals 200 include, for example, computers, tablets, mobile phones, and the like. Input/output device 210 receives information for arithmetic device 220 to execute processing. Also, the input/output device 210 outputs the result of the processing executed by the arithmetic device 220 . The input/output device 210 includes various input devices and output devices, such as keyboards, mice, microphones, displays, speakers, and touch panels.

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 agricultural field management device 100 to the arithmetic device 220 . Moreover, the signal which the arithmetic unit 220 produced|generated is transferred to the agricultural field management apparatus 100. FIG. The communication device 230 includes various interfaces such as NIC (Network Interface Card) and USB (Universal Serial Bus).

The storage device 240 stores various data such as a display program 320 for displaying information about the farm field 400, such as the degree of inclination, evaluation values, and the like. 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 the computer-readable storage medium 2, or provided as a computer program product downloadable from a server.

By reading and executing the display program 320, the arithmetic device 220 cooperates with the input/output device 210 to implement the display unit 250 as shown in FIG. The display unit 250 acquires information about the farm field 400 from the farm field management device 100 and displays the acquired information.

(Operation of field management device)
When the information about the farm field 400 is obtained, the computing device 120 of the farm field management device 100 reads and executes the farm field management program 310 . By executing the farm field management program 310, the computing device 120 executes the processing shown in FIG. 8, which is the farm field management method.

In step S<b>110 , the data storage unit 150 realized by the computing device 120 acquires information regarding the agricultural field 400 . For example, the data storage unit 150 acquires operation information acquired from the work device 30 . The data storage unit 150 calculates information about the farm field 400, such as the area of the farm field 400 and an evaluation value, based on the acquired operation information.

The operating information includes information representing the operating state of the working device 30 when working in the field 400, such as the speed, steering angle, engine speed, ON/OFF status of various clutches, working device 30, and so on. 30, including location information at each time, information representing work periods, and the like. When the work device 30 is a vehicle that tows the work machine, such as a tractor, the operation information includes the number of PTO (power take-off) revolutions when power is transmitted to the work machine, the hitch height indicating the posture of the work machine, and the height of the hitch. Information such as lift arm angle may also be included.

The operation information also includes position information of the work device 30 . The work device 30 includes a positioning device, such as a GNSS (Global Navigation Satellite System) receiver, and obtains position information, such as latitude, longitude, and altitude, representing the position at each time when the work device 30 moves.

The data storage unit 150 determines the area of the farm field 400 where the work device 30 has worked based on the position information of the work device 30 . For example, the area of the farm field 400 is represented by any closed figure, such as a polygon or rectangle, including the position represented by the acquired position information. For example, the farm field 400 is represented by a graphic enclosing all of the acquired position information. Also, the data storage unit 150 acquires the altitude at each position of the field 400 based on the position information of the work device 30 .

The data storage unit 150 may also determine the evaluation value of the work performed by the work device 30 based on the operation information. For example, when the evaluation value includes yield, the yield sensor provided in work device 30 measures the yield of crops harvested in field 400 . The measured yield is transmitted to the data storage unit 150 of the agricultural field management device 100 as operation information. Moreover, when the evaluation value includes the harvesting work time, the data storage unit 150 calculates the work time during which the work device 30 has worked in the field 400 based on the time information included in the position information. For example, the working time represents the time from when the working device 30 enters the field 400 to when it leaves the field 400 . Also, the work period may represent a period from when the engine of the work device 30 is started until it is stopped. The determined evaluation values, such as yield and harvesting time, are stored in the field data 300 . Note that the evaluation value may be acquired from a device other than the working device 30 . For example, a measuring device installed in a harvest facility may measure the yield of harvested crops and transmit information representing the measured yield to the agricultural field management device 100 .

In step S<b>120 , the altitude dividing unit 155 divides the agricultural field 400 according to the altitude and calculates the altitude divided areas 410 . As shown in FIG. 3, one altitude division area 410 represents, for example, an area whose altitude is included in a predetermined range. For example, first altitude segmented region 410-1 represents a region whose altitude is greater than a first threshold. A second altitude division area 410-2 represents an area whose altitude is equal to or less than the first threshold and greater than the second threshold. A third altitude division area 410-3 represents an area whose altitude is equal to or lower than the second threshold.

The first threshold and the second threshold are set in advance, and may be set by the user, or may be fixed values, for example. Further, the altitude dividing unit 155 may further have one or more thresholds, for example, a third threshold, and divide the farm field 400 into four or more. Adjacent threshold differences may be equal to or different from each other. For example, when the third threshold is less than the second threshold, the difference between the first and second thresholds may or may not be the same as the difference between the second and third thresholds.

In step S<b>130 shown in FIG. 8 , the slope calculator 160 calculates the slope of the farm field 400 based on the area information of the farm field 400 . For example, first, the slope calculator 160 detects a maximum position 401 with the highest altitude and a minimum position 402 with the lowest altitude in a field 400, as shown in FIG. The inclination calculator 160 detects, for example, a position represented by position information with the highest altitude among the position information of the work device 30 as the maximum position 401 . Further, the inclination calculation unit 160 detects the position represented by the position information with the lowest altitude among the position information of the work device 30 as the minimum position 402 .

Next, the tilt calculator 160 calculates the degree of tilt based on the height 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 . The inclination calculator 160 calculates an altitude difference 440 by subtracting the altitude of the minimum position 402 from the altitude of the maximum position 401, as shown in FIG. The tilt calculator 160 also calculates the distance from the maximum position 401 to the minimum position 402 on the horizontal plane as a horizontal projection distance 430 . The inclination is calculated by dividing the calculated altitude difference 440 by the horizontal projection distance 430 . The calculated inclination is recorded in the agricultural field data 300 .

In step S<b>140 shown in FIG. 8 , the area calculator 165 calculates the slope area 451 based on the calculated slope and the horizontal projection area 431 . For example, the area calculation unit 165 calculates the area of the agricultural field 400 on the horizontal plane as a horizontal projected area 431, as shown in FIG. For example, the area calculation unit 165 first calculates the locus on the horizontal plane that the work device 30 has moved while working in the field 400 based on the position information of the work device 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 work device 30 . Next, the area calculation unit 165 calculates the area of the work area where work is performed when the work device 30 moves along the trajectory on the horizontal plane as the horizontal projection area 431 . For example, the working area represents the area occupied by the trajectory on the horizontal plane having the working width set for each working device 30 . The working width represents the distance in the direction orthogonal to the traveling direction of the area where work is performed when the working device 30 moves.

Based on the degree of inclination, the area calculation unit 165 calculates the inclination ratio of the distance between the maximum position 401 and the minimum position 402 on the inclined surface 450 with respect to the horizontal projection distance 430 shown in FIG. 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 altitude difference 440 and the horizontal projection distance 430 based on the Pythagorean theorem. The calculated slope area 451 is recorded in the farm field data 300 .

In step S<b>150 shown in FIG. 8 , the evaluation calculation unit 170 calculates an evaluation value based on the slope area 451 and the slope of the farm field 400 . Specifically, the evaluation calculation unit 170 calculates an evaluation value representing the relationship between the slope area 451 and the evaluation of the work on the field 400 . For example, the evaluation calculation unit 170 calculates the unit yield representing the ratio between the sloped area 451 and the yield in the field 400 . A ratio of the yield to the sloped area 451 may be calculated as a unit yield. The evaluation calculator 170 may also calculate an evaluation value representing the ratio between the sloped area 451 and the harvesting time in the field 400 . The evaluation calculation unit 170 may calculate an evaluation value representing the ratio of the sloped area 451 to the work time for harvesting in the field 400 . The calculated evaluation value is recorded in the field data 300 .

In step S160 shown in FIG. 8 , the output unit 175 outputs evaluation information representing the evaluation value of the farm field 400 and tilt information representing the degree of tilt of the farm field 400 to the terminal 200 based on the farm field data 300 . Also, the tilt information includes information representing the altitude division area 410 .

In step S<b>170 , the display unit 250 of the terminal 200 displays the evaluation information and the tilt information on the input/output device 210 . As shown in FIG. 3, the display unit 250 acquires information representing the altitude division areas 410 from the inclination information, and identifiably displays the altitude division areas 410 obtained by dividing the field 400 according to the altitude on the map. Display an image. For example, the display unit 250 displays an image in which the first height division area 410-1, the second height division area 410-2, and the third height division area 410-3 are expressed in different colors on the map.

Display unit 250 also displays the boundary between first height division area 410-1 and second height division area 410-2 and the boundary between second height division area 410-2 and third height division area 410-3. may be expressed. The boundary between the first height division area 410-1 and the second height division area 410-2 is, for example, the height of the first threshold that divides the first height division area 410-1 and the second height division area 410-2. represents a line, eg a contour line, connecting the positions with Also, the boundary between the second height division region 410-2 and the third height division region 410-3 is, for example, the second threshold for dividing the second height division region 410-2 and the third height division region 410-3. Represents a line connecting locations with altitude. Thereby, the user can easily confirm the inclination of the field 400 .

The display unit 250 displays the evaluation information of the farm field 400 in the evaluation display area 500 . The evaluation display area 500 may display a plurality of evaluation values such as yield, yield, harvesting time, harvesting time per unit area, and the like. In addition, the display unit 250 may list the agricultural fields 400 and the corresponding evaluation information in a tabular format. Thereby, the user can confirm the highly accurate evaluation value according to the inclination of the field 400 .

Moreover, as shown in FIG. 4, the display unit 250 may display an image representing a plurality of areas of the farm fields 400 on a map on the same screen. The display unit 250 may classify the plurality of farm fields 400 into one or more inclined farm field groups 470 according to the degree of inclination. For example, the display unit 250 classifies the farm fields 400 whose degree of inclination is greater than the first threshold as the first inclined farm field group 470-1. The display unit 250 classifies the farm fields 400 whose degree of inclination is less than or equal to the first threshold value and larger than the second threshold value as a second inclined farm field group 470-2. The display unit 250 classifies the farm fields 400 whose degree of inclination is equal to or less than the second threshold as a third inclined farm field group 470-3.

The first threshold and the second threshold are set in advance, and may be set by the user, or may be fixed values, for example. Moreover, the display unit 250 may further have one or more thresholds, for example, a third threshold, and classify the fields 400 into four or more. Adjacent threshold differences may be equal to or different from each other. For example, when the third threshold is less 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.

The display unit 250 displays, on the input/output device 210, an image representing the classified sloping field group 470 in an identifiable manner. For example, the display unit 250 displays an image 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 represented in different colors on the map. Thereby, the user can easily grasp the difference in inclination in the plurality of farm fields 400 . In addition, the user can perform analysis according to the slope of the farm field 400 by comparing the evaluation information of the plurality of farm fields 400 and the slope of the plurality of farm fields 400 .

In this way, the farm field management system 1000 displays evaluation information and area information according to the slope of the farm field 400, thereby supporting cultivation management by the user.

(Modification)
The configuration described in the embodiment is an example, and the configuration can be changed within a range that does not hinder the functions. For example, information representing the altitude of the field 400 may be acquired from a device other than the working device 30 . For example, the data storage unit 150 may acquire altitude information of the farm field 400 from an aircraft that measures the altitude of the ground surface 420, such as a drone. In this case, the flying object measures the altitude of the ground surface 420 in the field 400 and transmits altitude information representing the measured altitude to the agricultural field management device 100 . The data storage unit 150 may also acquire already measured altitude information, for example, altitude information measured by the Geospatial Information Authority of Japan.

The inclination calculator 160 may calculate the inclination in a plurality of small areas 460 obtained by dividing the field 400, as shown in FIG. The small area 460 is determined by any method, and may be determined so as to be surrounded by a line segment parallel to the latitude line and a line segment parallel to the longitude line, for example. Further, the small area 460 may be formed of a polygon having the position information acquired by the work device 30 as the vertex 461 . In this case, the slope calculator 160 detects a maximum position 401B with the highest altitude and a minimum position 402B with the lowest altitude in each small region 460, as shown in FIG. Next, tilt calculator 160 calculates the degree of tilt of small region 460 based on height difference 440B between maximum position 401B and minimum position 402B and horizontal projection distance 430B between maximum position 401B and minimum position 402B. The calculated tilt degree of each small region 460 is output to the terminal 200 by the output unit 175 as tilt information. The display unit 250 of the terminal 200 displays the inclination of each small area 460 on the map in a distinguishable manner. Thereby, the user can confirm the difference in inclination in the farm field 400 .

The slope area 451 represents the area corresponding to the slope of the farm field 400 and may be calculated by any method. For example, as shown in FIG. 9, the area calculation unit 165 calculates the area according to the inclination of each small area 460 in a plurality of small areas 460 obtained by dividing the farm field 400, and calculates the area of each small area 460. You may calculate the slope area 451 based on. The small area 460 is determined by an arbitrary method, for example, it may be determined so as to be surrounded by a line segment parallel to the latitude line and a line segment parallel to the longitude line. may be formed of a polygon with the vertex 461 of . For example, the area of the small area 460 is 3 when the small area 460 is formed by a triangle whose vertices 461 are three pieces of the position information of the work device 30 (for example, information having latitude, longitude, and altitude). It is calculated by the area of the triangle on the plane passing through the two vertices 461 . The slope area 451 is calculated by totaling the calculated areas of the small regions 460 .

In this case, as shown in FIG. 10, in each small area 460, the area calculation unit 165 first passes through the maximum position 401B with the maximum altitude and 402B with the minimum altitude, and then reaches the ground surface 420. Determine an inclined plane 450B that approximates to . The inclined plane 450B may be a plane that passes through at least three vertices 461 of the vertices 461 of the small region 460 . Next, the area calculation unit 165 calculates the area projected in the vertical direction onto the inclined surface 450B on which the small region 460 is determined as the inclined area 451B. Finally, the area calculator 165 calculates the sloped area 451 of the farm field 400 based on the sloped area 451B of each small region 460 . For example, the area calculator 165 sums up the sloped areas 451B of the small regions 460 to calculate the sloped area 451 of the field 400 .

The area calculation unit 165 calculates an inclined area 451 that approximates the area of the ground surface 420 by using the inclined area 451B in the sub-regions 460 obtained by dividing the farm field 400 . Thereby, the user can confirm the evaluation value with high accuracy.

In addition, the degree of inclination may be expressed by any method as long as the inclination of the field 400 can be expressed. For example, the slope calculator 160 may calculate the slope of the farm field 400 based on the slope area 451 and the horizontal projection area 431 shown in FIG. For example, the tilt calculator 160 may calculate the ratio of the tilt area 451 to the horizontal projection area 431 as the degree of tilt.

The embodiments and modifications described above are examples, and the configurations described in the embodiments and modifications may be arbitrarily changed and/or combined as long as the functions are not hindered. may Furthermore, some of the functions described in the embodiment and modifications may be omitted as long as the required functions can be realized. For example, the terminal 200 may perform part or all of the processing of the agricultural field management device 100 . Moreover, the agricultural field management apparatus 100 may perform a part or all of the processing of the terminal 200 . For example, part of the processing of step S170 may be performed by the output unit 175 of the agricultural field management device 100. For example, the output unit 175 may classify a plurality of farm fields 400 into one or more inclined farm field groups 470 according to the degree of inclination. Information representing the classified inclined field group 470 is output to the terminal 200 by the output unit 175 .

Also, a part of the processing of the agricultural field management device 100 may be omitted. For example, the altitude dividing unit 155 may be omitted, and the process 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 division areas 410 obtained by dividing the farm field 400 according to the altitude.

Alternatively, the inclination calculator 160 may be omitted, and step S130 shown in FIG. 8 may be omitted. In this case, the area calculator 165 may calculate the slope ratio of the distance between the maximum position 401 and the minimum position 402 on the sloped surface 450 with respect to the horizontal projection distance 430 shown in FIG. 5 without using the slope. Also, the display unit 250 of the terminal 200 may not display the degree of inclination.

Also, 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 have to display the evaluation value corresponding to the slope of the field 400 .

1, 2: storage medium 20: network 30: work device 100: farm field management device 110: input/output device 120: arithmetic device 130: communication device 140: storage device 150: data storage unit 155: altitude division unit 160: inclination calculation unit 165: Area calculation unit 170: Evaluation calculation unit 175: Output unit 200: Terminal 210: Input/output device 220: Arithmetic device 230: Communication device 240: Storage device 250: Display unit 300: Field data 310: Field management program 320: Display Program 400 : Field 401 : Maximum position 402 : Minimum position 410 : Altitude division area 420 : Ground surface 430 : Horizontal projection distance 431 : Horizontal projection area 440 : Height difference 450 : Inclined surface 451 : Inclined area 460 : Small area 461 : Vertex 470: Sloping field group 500: Evaluation display area 1000: Field management system

Claims (15)

calculating a slope area representing the area of the farm field according to the slope of the farm field;
Calculating an evaluation value representing the relationship between the evaluation of the work performed in the field and the slope area;
outputting evaluation information representing the evaluation value;
field management methods including; Calculating the slope area includes:
The agricultural field management method according to claim 1, comprising calculating the slope area based on the difference in altitude in the agricultural field and the horizontally projected area of the agricultural field. The altitude difference in the field represents the difference between the maximum altitude and the minimum altitude in the field,
Calculating the slope area includes:
calculating a degree of inclination representing the inclination of the field based on the difference in altitude and the horizontal projection distance from the maximum position where the altitude is the maximum value to the minimum position where the altitude is the minimum value;
calculating the inclined area based on the degree of inclination and the horizontally projected area of the farm field;
The field management method according to claim 2, comprising: Calculating the slope area includes:
calculating, in each of a plurality of sub-regions obtained by dividing the field, a slope area of the sub-region according to the slope of the sub-region;
calculating the slope area of the agricultural field based on the calculated slope area of the small region;
The field management method according to claim 1, comprising: The farm field management method according to any one of claims 1 to 4, wherein the evaluation value is represented by a ratio between the slope area and the evaluation, and represents the evaluation based on the slope of the farm field. The farm field management method according to any one of claims 1 to 5, wherein the evaluation represents a ratio of the sloped area to the working time of the work performed in the farm field. The field management method according to any one of claims 1 to 6, wherein the evaluation represents a ratio of yield in the field to the sloped area. The agricultural field management method according to any one of claims 1 to 7, further comprising: outputting area information representing altitude divided areas obtained by dividing the agricultural field according to altitude. Calculating a slope representing slopes of a plurality of fields;
Classifying the plurality of farm fields into a group of sloping farm fields according to the degree of inclination;
Distinguishably displaying the group of inclined fields on the same screen;
field management methods including; Calculating the degree of inclination includes:
calculating a difference between a maximum altitude value and a minimum altitude value in each of the plurality of fields as an altitude difference;
calculating the degree of inclination based on the altitude difference and the horizontal projection distance from the maximum position where the altitude is the maximum value to the minimum position where the altitude is the minimum value;
The field management method according to claim 9, comprising: Calculating the degree of inclination includes:
calculating, in each of the plurality of farm fields, a slope area according to the slope of each of the farm fields;
calculating the degree of inclination based on the inclined area and the horizontally projected area of each field;
The field management method according to claim 9, comprising: an area calculation unit that calculates a slope area representing the area of the farm field according to the slope of the farm field;
an evaluation calculation unit that calculates an evaluation value representing a relationship between the evaluation of the work performed in the field and the slope area;
an output unit that outputs evaluation information representing the evaluation value;
A field management system with a slope calculation unit that calculates slopes representing slopes of a plurality of fields;
a display unit that distinguishes and displays on the same screen the group of inclined farm fields into which the plurality of farm fields are classified according to the degree of inclination;
A field management system with calculating a slope area representing the area of the farm field according to the slope of the farm field;
Calculating an evaluation value representing the relationship between the evaluation of the work performed in the field and the slope area;
outputting evaluation information representing the evaluation value;
A field management program that causes the arithmetic unit to execute. Calculating a slope representing slopes of a plurality of fields;
Classifying the plurality of farm fields into a group of sloping farm fields according to the degree of inclination;
Distinguishably displaying the group of inclined fields on the same screen;
A field management program that causes the arithmetic unit to execute.

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