Global Food Security-support Analysis Data (GFSAD) Cropland Extent data from the GFSAD30AUNZCNMOCE product over the Midwestern United States, 2010.
View full-size imageThe 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 North America for nominal year 2010 at 30 meter resolution (GFSAD30NACE). 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 GFSAD30NACE data product uses a combination of the pixel-based supervised classifier, Random Forest (RF), and the object-oriented classifier, Recursive Hierarchical Image Segmentation (RHSEG). The classifiers retrieve cropland extent from a combination of Landsat 5 Thematic Mapper (TM) and Landsat 7 Enhanced Thematic Mapper Plus (ETM+) data and elevation derived from the Shuttle Radar Topography Mission (SRTM) Version 3 data products. Each GFSAD30NACE GeoTIFF file contains a cropland extent layer that defines areas of cropland, non-cropland, and water bodies over a 10° by 10° area.
| Characteristic | Description |
|---|---|
| Collection | MEaSUREs GFSAD |
| DOI | 10.5067/MEaSUREs/GFSAD/GFSAD30NACE.001 |
| File Size | ~23.51 MB |
| Temporal Resolution | Multi-Year |
| Temporal Extent | 2008-01-01 to 2015-12-31 |
| Spatial Extent | North America |
| Coordinate System | Geographic Latitude and Longitude |
| Datum | World Geodetic System (WGS84) |
| File Format | GeoTIFF |
| Geographic Dimensions | 10° x 10° |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 1 |
| Columns/Rows | 37114 x 37253 |
| Pixel Size | 30 m |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| Band 1 | Cropland Extent for North America defined with three classes | N/A | 8-bit unsigned integer | N/A | N/A | 0 to 2 | N/A |
| Class Label | Name | Description |
|---|---|---|
| 0 | Water | Water bodies |
| 1 | Non-Cropland | Non-Cropland areas |
| 2 | Cropland | Cropland areas |
Filename convention: GFSAD30NACE_2010_GridTile_001_ProcessingDate(YYYYJJJHHMMSS).tif
Product Quality information can be found on page 29 of the Algorithm Theoretical Basis Document (ATBD).
Known issues including constraints and limitations are provided on page 39 of the ATBD.