New interactive maps of global cropland now available online
The U.S. Geological Survey (USGS) has released a worldwide map that details croplands in high resolution in an ongoing effort to monitor croplands and water use.
The Global Food Security Analysis-Support Data at 30 Meters (GFSAD30) is a NASA funded project to provide high resolution global cropland data and associated water use that contributes towards global food security in the twenty-first century. The GFSAD30 products are derived through multi-sensor remote sensing data (e.g., Landsat, MODIS, AVHRR), secondary data, and field-plot data and aim to document cropland dynamics from 1990 to 2017. The resource maps and produces cropland products of the world at a 30 meter resolution, covering:
- Cropland extent/area;
- Crop types with a focus on 8 crops that occupy 70% of the global cropland areas;
- Irrigated versus rainfed;
- Cropping intensities: single, double, triple, and continuous cropping;
- Cropland change over space and time: 1990-2017.
- Crop productivity (productivity per unit of land; kg/m2)
- Water productivity (crop per drop or productivity per unit of water; kg/m3).
While some of the food system challenges facing humanity are local, in an interconnected world, adopting a global perspective is essential. Many environmental issues, such as climate change, need supranational commitments and action to be addressed effectively. Due to ever increasing global trade flows, prices of commodities are connected through space; a drought in Romania may thus increase the price of wheat in Zimbabwe.
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