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Table 1 Source of data for each environmental raster

From: Explaining the geographic spread of emerging epidemics: a framework for comparing viral phylogenies and environmental landscape data

Original raster Source URL
Land cover IGBP (International Geosphere Biosphere Programme)
Elevation SRTM (Shuttle Radar Topography Mission) near-global DEMs (Digital Elevation Models)
Human density GRUMP (Global Rural–Urban Mapping Project), MAP (Malaria Atlas Project)
Inaccessibility Global Environment Monitoring Unit, Joint Research Centre of the European Commission