Table 2 Information of field survey samples, generated random points, and selected counties.
From: Mapping 10-m harvested area in the major winter wheat-producing regions of China from 2018 to 2022
Sowing Year | Sample Size | Sample Effect | Sample Type | Sample Province | Sample Source | |
|---|---|---|---|---|---|---|
Planted area | Harvested area | |||||
2018 | 49 | √ | Point | Hubei | ||
2019 | 5 | √ | Point | Henan | ||
2020 | 26 | √ | Point | Hebei | ||
107 | √ | Point | Shandong | |||
51 | √ | Point | Shaanxi | GPS field survey | ||
3956 | √ | Point | Henan | GPS field survey | ||
700 | √ | Point | The whole study area | |||
2021 | 17 | √ | Point | Hebei, Shandong | ||
2022 | 128 | √ | Point | Shandong | GPS field survey | |
