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) Accelerated expansion of global cropland extent in the 21st century. In Review. https://doi.org/10.21203/rs.3.rs-294463/v1

Data visualization using Google Earth Engine Apps

    https://glad.earthengine.app/view/global-cropland-dynamics

Dataset Access in Google Earth Engine

Image collection IDs for each cropland layer:

2003 "users/potapovpeter/Global_cropland_2003"
2007 "users/potapovpeter/Global_cropland_2007"
2011 "users/potapovpeter/Global_cropland_2011"
2015 "users/potapovpeter/Global_cropland_2015"
2019 "users/potapovpeter/Global_cropland_2019"

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.

 

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).

 

Cropland extent for each four-year interval.
Pixel value: 0-100, percent of croplands per pixel.

Net cropland extent change from 2003 to 2019.
Pixel value: 0-100, percent of cropland dynamic (net loss or net gain) per pixel.

 

Sample Reference Data

Sample reference data and interpretation results:
ttps://glad.geog.umd.edu/Potapov/Global_Crop/region_index.html