The cropland extent can be viewed at: https://croplands.org
The cropland extent product can be downloaded from: https://e4ftl01.cr.usgs.gov/MEASURES/GFSAD30NACE.001/2008.01.01/
Product documentation is available at:
- North America 2010 product: https://lpdaac.usgs.gov/products/gfsad30nacev001/
- Global cropland extent validation: https://lpdaac.usgs.gov/documents/169/GFSAD30VAL_ATBD.pdf
The associated paper can be viewed at: https://www.sciencedirect.com/science/article/abs/pii/S0034425718304619
