1. A field map generating system comprising: a crop data obtaining unit that obtains crop data, the crop data being 5 data pertaining to a crop harvested by a harvester, over time; a position information obtaining unit that obtains position information, the position information indicating the position where the crop is harvested in a field, over time; a polygon constructing unit that constructs a polygon on the basis of a 10 work width and a speed of the harvester, for each piece of the crop data obtained by the crop data obtaining unit; a data assigning unit that assigns the crop data or crop information based on the crop data to each polygon constructed by the polygon constructing unit; 15 a position information assigning unit that assigns the position information to each polygon constructed by the polygon constructing unit; and a field map generating unit that generates a field polygon map, the field polygon map being an aggregate of the polygons, by aggregating the polygons. 20

2. The field map generating system according to claim 1, further comprising: a working state determining unit that determines whether or not each of a plurality of regions of a work device included in the harvester, the regions 25 arranged in a left-right direction, are in a working state; and a work width calculating unit that calculates a work width of the harvester on the basis of the result of the determination by the working state determining unit. 30 3. The field map generating system according to claim 1 or 2, wherein the crop data obtaining unit can obtain a plurality of types of crop data over time; and the field map generating unit generates the field polygon map for each type of the crop data. 35

4. The field map generating system according to any one of claims 1 to 3, 58 wherein the crop data obtaining unit can obtain the crop yield over time as the crop data; and the data assigning unit assigns the crop yield to the polygons as the crop data. 5

5. The field map generating system according to any one of claims 1 to 3, wherein the crop data obtaining unit can obtain the crop yield over time as the crop data; and the data assigning unit assigns a per-surface area unit crop yield, 10 calculated by dividing the crop yield obtained by the crop data obtaining unit by a field surface area corresponding to the polygon to which the per-surface area unit crop yield is to be assigned, to the polygons, as the crop information.

6. The field map generating system according to any one of claims 1 to 5, 15 wherein the crop data obtaining unit can obtain a quality value, the quality value being a value indicating the quality of the crop, over time as the crop data; and the data assigning unit assigns the quality value to the polygons as the crop data. 20

7. The field map generating system according to claim 4, further comprising: a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from 25 the polygons, wherein the map converting unit calculates the crop yield to be assigned to each index segment by adding together surface area-appropriated crop yields of the parts of each polygon included in the index segments. 30 8. The field map generating system according to claim 5, further comprising: a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons, 35 wherein the map converting unit calculates a per-surface area unit crop yield to be assigned to each index segment by taking the sum of surface 59 area-appropriated crop yields of the parts of each polygon included in the index segments and dividing that sum by a field surface area corresponding to the index segment to which the per-surface area unit crop yield is to be assigned. 5 9. The field map generating system according to claim 6, further comprising: a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons, 10 wherein the map converting unit calculates the quality value to be assigned to each index segment as a mean value of the quality values assigned to polygons, among the polygons, included in the index segments; and when calculating the mean value, the map converting unit carries out weighting using a field surface area corresponding to the part of each polygon 15 present in each index segment.

10. The field map generating system according to any one of claims 7 to 9, wherein the map converting unit determines the size of the index segments in accordance with the work width of a different work vehicle from 20 the harvester.

11. A method of generating a field map pertaining to a crop in a field that is harvested by a traveling harvester, the method comprising: a step of obtaining position information of the traveling harvester over 25 time; a step of obtaining crop data of the crop over time; a step of creating a polygon on the basis of the travel state of the harvester at the time when the crop data is obtained; a step of assigning the obtained crop data to the corresponding polygon; 30 a step of generating a field map for the entire field by aggregating the polygons; a step of estimating a plurality of index segments that divide the field; and a step of converting the field map into a post-conversion map in which 35 the crop data is assigned to the index segments. 60

12. The field map generating method according to claim 11, wherein the polygon is created on the basis of a work width of the harvester and a speed of the harvester, the work width and the speed serving as the travel state. 5

13. The field map generating method according to claim 11 or 12, wherein the crop data is a crop yield of a harvested crop; and the crop yield to be assigned to each index segment is calculated by adding together surface area-appropriated crop yields of the parts of each 10 polygon included in the index segments.

14. The field map generating method according to claim 11 or 12, wherein the crop data is a per-surface area unit crop yield of a harvested crop; and 15 the per-surface area unit crop yield to be assigned to each index segment is calculated by taking the sum of surface area-appropriated crop yields of the parts of each polygon included in the index segments and dividing that sum by a field surface area corresponding to the index segment to which the per-surface area unit crop yield is to be assigned. 20

15. The field map generating method according to claim 11 or 12, wherein the crop data is a quality value of a harvested crop; the quality value to be assigned to each index segment is calculated as a mean value of the quality values assigned to the polygons included in the 25 index segments; and when calculating the mean value, weighting is carried out using a field surface area corresponding to the part of each polygon present in each index segment. 30 16. A field map generating system comprising: a data obtaining unit that, in a work vehicle that uses a work device to carry out agricultural work while traveling in a field, obtains, as obtained data, at least one of operation information, which is information pertaining to the operation of the machine, field information, which is information pertaining to 35 the field, and crop information, which is information pertaining to a crop; a position information obtaining unit capable of obtaining data 61 obtainment position information, which is position information of the work vehicle at the time when the obtained data is obtained by the data obtaining unit; a polygon constructing unit that constructs a polygon on the basis of 5 the data obtainment position information, a work width of the work device, and an obtainment timing of the obtained data by the data obtaining unit; a data assigning unit that assigns the obtained data to each polygon constructed by the polygon constructing unit; and a field map generating unit that generates a field polygon map, the 10 field polygon map being an aggregate of the polygons, by aggregating the polygons, wherein if the data obtainment position information has not been obtained by the position information obtaining unit, the polygon constructing unit complementarily constructs a polygon corresponding to the timing at 15 which the data obtainment position information was not obtained on the basis of polygons corresponding to the timings before and after the timing at which the data obtainment position information was not obtained, and the data assigning unit assigns the obtained data corresponding to the timing at which the data obtainment position information was not obtained to the 20 complementarily-constructed polygon.

17. The field map generating system according to claim 16, wherein when complementarily constructing a polygon, the polygon constructing unit complementarily constructs a polygon corresponding to the 25 timing at which the data obtainment position information was not obtained, as one or more polygons located between the polygon corresponding to the timing before the timing at which the data obtainment position information was not obtained, and the polygon corresponding to the timing after the timing at which the data obtainment position information was not obtained, in a travel 30 route of the work vehicle.

18. The field map generating system according to claim 16 or 17, further comprising: a vehicle speed detecting unit that detects a speed of the work vehicle, 35 wherein if a state in which the data obtainment position information is not obtained has continued for a consecutive plurality of timings, the polygon 62 constructing unit complementarily constructs a consecutive plurality of polygons so as to correspond to each of the consecutive plurality of timings, and also determines lengths of the complementarily-constructed polygons with respect to a travel direction of the work vehicle on the basis of the speed 5 detected by the vehicle speed detecting unit and an obtainment time interval of the obtained data by the data obtaining unit.

19. The field map generating system according to claim 16 or 17, wherein if a state in which the data obtainment position information is 10 not obtained has continued for a consecutive plurality of timings, the polygon constructing unit complementarily constructs a single polygon corresponding to the consecutive plurality of timings, and the data assigning unit takes a value obtained by averaging or adding the plurality of pieces of obtained data corresponding to the consecutive plurality of timings according to attributes of 15 the obtained data and assigns that value to the single complementarily-constructed polygon.

20. The field map generating system according to any one of claims 16 to 19, 20 wherein the obtained data obtained by the data obtaining unit includes working information, indicating whether the work device is in a working state or a non-working state, as the operation information; and if a state in which the data obtainment position information is not obtained has continued for a consecutive plurality of timings, and a timing at 25 which the work device is in a non-working state is included in the consecutive plurality of timings, the polygon constructing unit complementarily constructs one or more polygons on a line extending toward a forward side of the polygon located to the rear in the travel direction of the work vehicle for a timing before the timing at which the work device is in a non-working state, and 30 complementarily constructs one or more polygons on a line extending toward a rearward side of the polygon located to the front in the travel direction of the work vehicle for a timing after the timing at which the work device is in a non-working state. 35 21. The field map generating system according to any one of claims 16 to 20, 63 wherein the data obtaining unit can obtain a crop yield over time as the obtained data; the data assigning unit assigns the crop yield to the polygons as the obtained data; 5 the system further comprises a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons; and the map converting unit calculates the crop yield to be assigned to each index segment by adding together surface area-appropriated crop yields of the 10 parts of each polygon included in the index segments.

22. The field map generating system according to any one of claims 16 to 20, wherein the data obtaining unit can obtain a crop yield over time as 15 the obtained data; the data assigning unit assigns a per-surface area unit crop yield, calculated by dividing the crop yield obtained by the data obtaining unit by a field surface area corresponding to the polygon to which the per-surface area unit crop yield is to be assigned, to the polygons, as the crop information; 20 the system further comprises a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons; and the map converting unit calculates a per-surface area unit crop yield to be assigned to each index segment by taking the sum of surface area-25 appropriated crop yields of the parts of each polygon included in the index segments and dividing that sum by a field surface area corresponding to the index segment to which the per-surface area unit crop yield is to be assigned.

23. The field map generating system according to any one of claims 16 to 30 20, wherein the data obtaining unit can obtain a quality value, the quality value being a value indicating the quality of the crop, over time as the obtained data; the data assigning unit assigns the quality value to the polygons as the 35 obtained data; the system further comprises a map converting unit that converts the 64 field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons; the map converting unit calculates the quality value to be assigned to each index segment as a mean value of the quality values assigned to polygons, 5 among the polygons, included in the index segments; and when calculating the mean value, the map converting unit carries out weighting using a field surface area corresponding to the part of each polygon present in each index segment. 10 24. A method of generating a field map pertaining to a crop in a field that is harvested by a traveling harvester, the method comprising: a step of obtaining crop data of the crop over time; a step of obtaining data obtainment position information of the harvester during travel when obtaining the crop data of the crop; 15 a step of creating a polygon on the basis of the data obtainment position information of the harvester at the time when the crop data is obtained; a step of assigning the obtained crop data to the corresponding polygon; if a polygon has not been created due to the data obtainment position information of the harvester not being obtained when the crop data is obtained, 20 a step of complementarily creating the polygon that was not created; a step of assigning corresponding crop data to the complementarily-created polygon; and a step of generating a field map for the entire field by aggregating the polygons; 25 wherein a polygon corresponding to the timing at which the data obtainment position information was not obtained is complementarily created on the basis of the polygons corresponding to the timings before and after the timing at which the data obtainment position information was not obtained. 65

WE CLAIM:
1. A field map generating system comprising:
a crop data obtaining unit that obtains crop data, the crop data being 5 data pertaining to a crop harvested by a harvester, over time;
a position information obtaining unit that obtains position information, the position information indicating the position where the crop is harvested in a field, over time;
a polygon constructing unit that constructs a polygon on the basis of a 10 work width and a speed of the harvester, for each piece of the crop data obtained by the crop data obtaining unit;
a data assigning unit that assigns the crop data or crop information
based on the crop data to each polygon constructed by the polygon constructing
unit;
15 a position information assigning unit that assigns the position
information to each polygon constructed by the polygon constructing unit; and a field map generating unit that generates a field polygon map, the field polygon map being an aggregate of the polygons, by aggregating the polygons. 20
2. The field map generating system according to claim 1, further
comprising:
a working state determining unit that determines whether or not each of a plurality of regions of a work device included in the harvester, the regions 25 arranged in a left-right direction, are in a working state; and
a work width calculating unit that calculates a work width of the harvester on the basis of the result of the determination by the working state determining unit.
30 3. The field map generating system according to claim 1 or 2,
wherein the crop data obtaining unit can obtain a plurality of types of crop data over time; and
the field map generating unit generates the field polygon map for each type of the crop data. 35
4. The field map generating system according to any one of claims 1 to 3,
58

wherein the crop data obtaining unit can obtain the crop yield over time as the crop data; and
the data assigning unit assigns the crop yield to the polygons as the crop data. 5
5. The field map generating system according to any one of claims 1 to 3,
wherein the crop data obtaining unit can obtain the crop yield over time
as the crop data; and
the data assigning unit assigns a per-surface area unit crop yield,
10 calculated by dividing the crop yield obtained by the crop data obtaining unit
by a field surface area corresponding to the polygon to which the per-surface
area unit crop yield is to be assigned, to the polygons, as the crop information.
6. The field map generating system according to any one of claims 1 to 5,
15 wherein the crop data obtaining unit can obtain a quality value, the
quality value being a value indicating the quality of the crop, over time as the crop data; and
the data assigning unit assigns the quality value to the polygons as the crop data. 20
7. The field map generating system according to claim 4, further
comprising:
a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from 25 the polygons,
wherein the map converting unit calculates the crop yield to be assigned to each index segment by adding together surface area-appropriated crop yields of the parts of each polygon included in the index segments.
30 8. The field map generating system according to claim 5, further comprising:
a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons,
35 wherein the map converting unit calculates a per-surface area unit
crop yield to be assigned to each index segment by taking the sum of surface
59

area-appropriated crop yields of the parts of each polygon included in the index segments and dividing that sum by a field surface area corresponding to the index segment to which the per-surface area unit crop yield is to be assigned.
5 9. The field map generating system according to claim 6, further comprising:
a map converting unit that converts the field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons,
10 wherein the map converting unit calculates the quality value to be
assigned to each index segment as a mean value of the quality values assigned to polygons, among the polygons, included in the index segments; and
when calculating the mean value, the map converting unit carries out weighting using a field surface area corresponding to the part of each polygon
15 present in each index segment.
10. The field map generating system according to any one of claims 7 to 9,
wherein the map converting unit determines the size of the index
segments in accordance with the work width of a different work vehicle from 20 the harvester.
11. A method of generating a field map pertaining to a crop in a field that
is harvested by a traveling harvester, the method comprising:
a step of obtaining position information of the traveling harvester over 25 time;
a step of obtaining crop data of the crop over time; a step of creating a polygon on the basis of the travel state of the harvester at the time when the crop data is obtained;
a step of assigning the obtained crop data to the corresponding polygon;
30 a step of generating a field map for the entire field by aggregating the
polygons;
a step of estimating a plurality of index segments that divide the field; and
a step of converting the field map into a post-conversion map in which 35 the crop data is assigned to the index segments.
60

12. The field map generating method according to claim 11,
wherein the polygon is created on the basis of a work width of the harvester and a speed of the harvester, the work width and the speed serving as the travel state. 5
13. The field map generating method according to claim 11 or 12,
wherein the crop data is a crop yield of a harvested crop; and
the crop yield to be assigned to each index segment is calculated by adding together surface area-appropriated crop yields of the parts of each 10 polygon included in the index segments.
14. The field map generating method according to claim 11 or 12,
wherein the crop data is a per-surface area unit crop yield of a
harvested crop; and
15 the per-surface area unit crop yield to be assigned to each index
segment is calculated by taking the sum of surface area-appropriated crop yields of the parts of each polygon included in the index segments and dividing that sum by a field surface area corresponding to the index segment to which the per-surface area unit crop yield is to be assigned.
20
15. The field map generating method according to claim 11 or 12,
wherein the crop data is a quality value of a harvested crop;
the quality value to be assigned to each index segment is calculated as a mean value of the quality values assigned to the polygons included in the 25 index segments; and
when calculating the mean value, weighting is carried out using a field surface area corresponding to the part of each polygon present in each index segment.
30 16. A field map generating system comprising:
a data obtaining unit that, in a work vehicle that uses a work device to
carry out agricultural work while traveling in a field, obtains, as obtained data,
at least one of operation information, which is information pertaining to the
operation of the machine, field information, which is information pertaining to
35 the field, and crop information, which is information pertaining to a crop;
a position information obtaining unit capable of obtaining data
61

obtainment position information, which is position information of the work vehicle at the time when the obtained data is obtained by the data obtaining unit;
a polygon constructing unit that constructs a polygon on the basis of 5 the data obtainment position information, a work width of the work device, and an obtainment timing of the obtained data by the data obtaining unit;
a data assigning unit that assigns the obtained data to each polygon constructed by the polygon constructing unit; and
a field map generating unit that generates a field polygon map, the 10 field polygon map being an aggregate of the polygons, by aggregating the polygons,
wherein if the data obtainment position information has not been obtained by the position information obtaining unit, the polygon constructing unit complementarily constructs a polygon corresponding to the timing at 15 which the data obtainment position information was not obtained on the basis of polygons corresponding to the timings before and after the timing at which the data obtainment position information was not obtained, and the data assigning unit assigns the obtained data corresponding to the timing at which the data obtainment position information was not obtained to the 20 complementarily-constructed polygon.
17. The field map generating system according to claim 16,
wherein when complementarily constructing a polygon, the polygon constructing unit complementarily constructs a polygon corresponding to the
25 timing at which the data obtainment position information was not obtained, as one or more polygons located between the polygon corresponding to the timing before the timing at which the data obtainment position information was not obtained, and the polygon corresponding to the timing after the timing at which the data obtainment position information was not obtained, in a travel
30 route of the work vehicle.
18. The field map generating system according to claim 16 or 17, further
comprising:
a vehicle speed detecting unit that detects a speed of the work vehicle,
35 wherein if a state in which the data obtainment position information is
not obtained has continued for a consecutive plurality of timings, the polygon
62

constructing unit complementarily constructs a consecutive plurality of polygons so as to correspond to each of the consecutive plurality of timings, and also determines lengths of the complementarily-constructed polygons with respect to a travel direction of the work vehicle on the basis of the speed 5 detected by the vehicle speed detecting unit and an obtainment time interval of the obtained data by the data obtaining unit.
19. The field map generating system according to claim 16 or 17,
wherein if a state in which the data obtainment position information is
10 not obtained has continued for a consecutive plurality of timings, the polygon constructing unit complementarily constructs a single polygon corresponding to the consecutive plurality of timings, and the data assigning unit takes a value obtained by averaging or adding the plurality of pieces of obtained data corresponding to the consecutive plurality of timings according to attributes of
15 the obtained data and assigns that value to the single complementarily-constructed polygon.
20. The field map generating system according to any one of claims 16 to
19,
20 wherein the obtained data obtained by the data obtaining unit includes
working information, indicating whether the work device is in a working state or a non-working state, as the operation information; and
if a state in which the data obtainment position information is not obtained has continued for a consecutive plurality of timings, and a timing at
25 which the work device is in a non-working state is included in the consecutive plurality of timings, the polygon constructing unit complementarily constructs one or more polygons on a line extending toward a forward side of the polygon located to the rear in the travel direction of the work vehicle for a timing before the timing at which the work device is in a non-working state, and
30 complementarily constructs one or more polygons on a line extending toward a rearward side of the polygon located to the front in the travel direction of the work vehicle for a timing after the timing at which the work device is in a non-working state.
35 21. The field map generating system according to any one of claims 16 to 20,
63

wherein the data obtaining unit can obtain a crop yield over time as the obtained data;
the data assigning unit assigns the crop yield to the polygons as the
obtained data;
5 the system further comprises a map converting unit that converts the
field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons; and
the map converting unit calculates the crop yield to be assigned to each index segment by adding together surface area-appropriated crop yields of the 10 parts of each polygon included in the index segments.
22. The field map generating system according to any one of claims 16 to
20,
wherein the data obtaining unit can obtain a crop yield over time as 15 the obtained data;
the data assigning unit assigns a per-surface area unit crop yield,
calculated by dividing the crop yield obtained by the data obtaining unit by a
field surface area corresponding to the polygon to which the per-surface area
unit crop yield is to be assigned, to the polygons, as the crop information;
20 the system further comprises a map converting unit that converts the
field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons; and
the map converting unit calculates a per-surface area unit crop yield to be assigned to each index segment by taking the sum of surface area-25 appropriated crop yields of the parts of each polygon included in the index segments and dividing that sum by a field surface area corresponding to the index segment to which the per-surface area unit crop yield is to be assigned.
23. The field map generating system according to any one of claims 16 to
30 20,
wherein the data obtaining unit can obtain a quality value, the quality value being a value indicating the quality of the crop, over time as the obtained data;
the data assigning unit assigns the quality value to the polygons as the 35 obtained data;
the system further comprises a map converting unit that converts the
64

field polygon map into a post-conversion map segmented into a plurality of index segments different from the polygons;
the map converting unit calculates the quality value to be assigned to each index segment as a mean value of the quality values assigned to polygons, 5 among the polygons, included in the index segments; and
when calculating the mean value, the map converting unit carries out weighting using a field surface area corresponding to the part of each polygon present in each index segment.
10 24. A method of generating a field map pertaining to a crop in a field that
is harvested by a traveling harvester, the method comprising:
a step of obtaining crop data of the crop over time;
a step of obtaining data obtainment position information of the
harvester during travel when obtaining the crop data of the crop;
15 a step of creating a polygon on the basis of the data obtainment position
information of the harvester at the time when the crop data is obtained; a step of assigning the obtained crop data to the corresponding polygon; if a polygon has not been created due to the data obtainment position information of the harvester not being obtained when the crop data is obtained, 20 a step of complementarily creating the polygon that was not created;
a step of assigning corresponding crop data to the complementarily-created polygon; and
a step of generating a field map for the entire field by aggregating the
polygons;
25 wherein a polygon corresponding to the timing at which the data
obtainment position information was not obtained is complementarily created on the basis of the polygons corresponding to the timings before and after the timing at which the data obtainment position information was not obtained.
65