The dataset represents a globally consistent cropland extent time-series at 30-m spatial resolution. Cropland defined as land used for annual and perennial herbaceous crops for human consumption, forage (including hay), and biofuel. Perennial woody crops, permanent pastures, and shifting cultivation are excluded from the definition. The fallow length is limited to four years for the cropland class. The cropland mapping was done using the consistently processed Landsat satellite data archive from 2000 to 2019. The Landsat time-series data were transformed into multitemporal metrics that described land surface phenology. These metrics were used as independent variables for a machine learning classification to map global croplands extent. The classification models were locally calibrated using extensive training data collected by visual interpretation of freely available high spatial resolution remotely sensed data. The crop mapping was performed in four-year intervals (2000-2003, 2004-2007, 2008-2011, 2012-2015, and 2016-2019). There is one cropland layer per epoch (five layers total), with the file name referred to the last year of the interval (2003, 2007, 2011, 2015, and 2019).
Dataset Reference
P. Potapov, S. Turubanova, M.C. Hansen, A. Tyukavina, V. Zalles, A. Khan, X.-P. Song, A. Pickens, Q. Shen, J. Cortez. (2021) Global maps of cropland extent and change show accelerated cropland expansion in the twenty-first century. Nature Food. https://doi.org/10.1038/
Data visualization using Google Earth Engine Apps
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Dataset Access in Google Earth EngineImage collection IDs for each cropland layer: 2003 "users/potapovpeter/Global_cropland_2003" Data values: 0 – no croplands or no data; 1 – croplands. |
Data Download
Map data provided in the geographic coordinates using the WGS84 reference system.
Data format: 8-bit unsigned LZW-compressed GeoTiff. Pixel size is 0.00025 × 0.00025 degree (~30 m × 30 m at Equator). Data aggregated into quadrant mosaics.
Pixel values: 0 – no croplands or no data; 1 – croplands.
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Global Overview Data Download
The reduced resolution data is provided for global overview and low-resolution modeling applications. The data is provided in the geographic coordinates using the WGS84 reference system. Data format: 8-bit unsigned LZW-compressed GeoTiff. Pixel size is 0.025 × 0.025 degrees (~3 km × 3 km at the Equator).
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Cropland extent for each four-year interval. |
Net cropland extent change from 2003 to 2019. |
Sample Reference Data
Sample reference data and interpretation results:
https://glad.geog.umd.edu/Potapov/Global_Crop/region_index.html
