Global Aridity and PET Database


The Global Potential Evapo-Transpiration (Global-PET) and Global Aridity Index (Global-Aridity) dataset provides high-resolution global raster climate data related to evapo-transpiration processes and rainfall deficit for potential vegetative growth.

SRTM 90m Digital Elevation Database v4.1


The SRTM digital elevation data, produced by NASA originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world.