Table 1 Source of data for each environmental raster
| Original raster | Source | URL |
|---|---|---|
| Land cover | IGBP (International Geosphere Biosphere Programme) | www.igbp.net |
| Elevation | SRTM (Shuttle Radar Topography Mission) near-global DEMs (Digital Elevation Models) | webmap.ornl.gov |
| Human density | GRUMP (Global Rural–Urban Mapping Project), MAP (Malaria Atlas Project) | www.map.ox.ac.uk |
| Inaccessibility | Global Environment Monitoring Unit, Joint Research Centre of the European Commission | bioval.jr.ec.europea.eu |