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Figure 3. Creating a cropland map through calibration of the synergy map with national crop statistics
This paper presents a methodology for the creation of a cropland map for Africa through the combination of five existing land cover products: GLC‐2000, MODIS Land Cover, GlobCover, MODIS Crop Likelihood and AfriCover. A synergy map is created in which the products are ranked by experts, which reflects the likelihood or probability that a given pixel is cropland. The cropland map is then calibrated with national and sub‐national crop statistics using a novel approach. Preliminary validation of the map was undertaken and the results are presented. The resulting cropland map has an accuracy of 83%, which is higher than the accuracy of any of the individual maps. The cropland map is freely available at agriculture.geo‐wiki.org.
Geophysical Research Letters – Wiley
Published: Feb 1, 2011
Keywords: ; ; ;
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