Global Food Security-support Analysis Data (GFSAD) Cropland Extent 2015 South America 30 m

PI: Prasad Thenkabail


The NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Global Food Security-support Analysis Data (GFSAD) data product provides cropland extent data over South America for nominal year 2015 at 30 meter resolution (GFSAD30SACE). The monitoring of global cropland extent is critical for policymaking and provides important baseline data that are used in many agricultural cropland studies pertaining to water sustainability and food security. The GFSAD30SACE data product uses the pixel-based supervised classifier, Random Forest (RF), to retrieve cropland extent from a combination of Landsat 5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper Plus (ETM+), Landsat 8 Operational Land Imager (OLI) data, and elevation derived from the Shuttle Radar Topography Mission (SRTM) Version 3 data products. Each GFSAD30SACE GeoTIFF file contains a cropland extent layer that defines areas of cropland, non-cropland, and water bodies over a 10° by 10° area.

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Collection and Granule


Characteristic Description
CollectionMEaSUREs GFSAD
File Size~27.97 MB
Temporal ResolutionMulti-Year
Temporal Extent2013-01-01 to 2016-12-31
Spatial ExtentSouth America
Coordinate SystemGeographic Latitude and Longitude
DatumWorld Geodetic System (WGS84)
File FormatGeoTIFF
Geographic Dimensions10° x 10°


Characteristic Description
Number of Science Dataset (SDS) Layers1
Columns/Rows37114 x 37253
Pixel Size30 m

Layers / Variables

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Band 1 Cropland Extent for South America defined with three classes N/A 8-bit unsigned integer N/A N/A 0 to 2 N/A

Cropland Extent Class Descriptions

Class Label Name Description
0 Water Water bodies
1 Non-Cropland Non-Cropland areas
2 Cropland Cropland areas

Filename convention: GFSAD30SACE_2015_GridTile_001_ProcessingDate(YYYYJJJHHMMSS).tif

Product Quality

Product Quality information can be found on page 17 of the Algorithm Theoretical Basis Document (ATBD).

Known Issues

Known issues including constraints and limitations are provided on page 18 of the ATBD.

About the image

Global Food Security-support Analysis Data (GFSAD) Cropland Extent data from the GFSAD30SACE product over Brazil, 2015.

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User Guide
Algorithm Theoretical Basis Document (ATBD)
Source Code

Using the Data

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