Product Title:
GDA CropID map for 2021 China Rice and Soybeans (250-meters)

Released:
September 2021

Referencing the file:
GDA CropID GIS map shall be referred to, in all instances, as “GDA_CropID_China_2021_Rice_Soybeans_250m”

Coverage:
China, 7 rice and soybean producing provinces – Anhui, Hebei, Heilongjiang, Inner Mongolia, Jiangsu, Jilin, and Liaoning. These provinces cumulatively contribute about 30% to China rice production and more than 50% to China soybean production. Due to the close spectral and crop calendar similarity, soybean mapped areas may include peanuts, rapeseed, and cotton.

Crop Harvest Year:
2021

Classification Categories:
Rice fields are designated a pixel value of 3
Soybean fields are designated a pixel value of 5

Spatial resolution:
250-meters. The original classification is performed at 30-meters.

Abstract:
The CropID product by GDA is a geo-referenced raster produced by GDA Corp under a Small Business Innovative Research (SBIR) contract with the USDA/FAS/GMA/IPAD.

GDA CropID maps utilize time series of GDA GeoChronicles™ imagery coverages. GDA GeoChronicles™ are global time series of 10-day, 10-meter analysis ready imagery coverages produced by GDA Corp from Copernicus Sentinel-2A/2B and Landsat 8.

GDA uses deep time series of GeoChronicles™ composites to identify crop type locations during each given season.

The 250-meters CropID product was originally produced at 30-meters spatial resolution. The final 30-meters crop mask was resampled to 250-meters for use on the USDA/NASA Global Agricultural Monitoring (GLAM) system at https://glam1.gsfc.nasa.gov/.

License:
GDA grants USDA Foreign Agricultural Service (FAS) a Federal Government-wide license to utilize the 250-meter products for Federal Government applications such as the USDA/NASA GLAM system (https://glam1.gsfc.nasa.gov/)

Resource Contact:
Dmitry Varlyguin, GDA Corp. / Chief Scientist
dmitry @ gdacorp . com