Global Food Security-support Analysis Data (GFSAD) Cropland Extent data from the GFSAD30AFCE product over eastern Africa, 2015.
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 the continent of Africa for nominal year 2015 at 30 meter resolution (GFSAD30AFCE). 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 GFSAD30AFCE data product uses two pixel-based supervised classifiers, Random Forest (RF) and Support Vector Machine (SVM), and one object-oriented classifier, Recursive Hierarchical Image Segmentation (RHSEG). The classifiers retrieve cropland extent from a combination of Landsat 8 Operational Land Imager (OLI) and Sentinel-2 MultiSpectral Instrument (MSI) data and elevation derived from the Shuttle Radar Topography Mission (SRTM) Version 3 data products. Each GFSAD30AFCE 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/GFSAD30AFCE.001 |
| File Size | ~19.04 MB |
| Temporal Resolution | Multi-Year |
| Temporal Extent | 2013-01-01 to 2016-06-30 |
| Spatial Extent | Africa |
| 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 | 37115 x 37375 |
| Pixel Size | 30 m |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| Band 1 | Cropland Extent for Africa 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/no-data |
| 1 | Non-Cropland | Non-Cropland areas |
| 2 | Cropland | Cropland areas |
Filename convention: GFSAD30AFCE_2015_GridTile_001_ProcessingDate(YYYYJJJHHMMSS).tif
Product Quality information can be found on page 19 of the Algorithm Theoretical Basis Document (ATBD).
Known issues including constraints and limitations are provided on page 20 of the ATBD.