WorldPop Archive global gridded spatial datasets. Version Alpha 0.9. 100m Travel Time To Major Cities 50K (tiled)

Travel time to nearest city with >50K population 2000 (Nelson, A.; Global Environment Monitoring Unit, Joint Research Centre of the European Commission, Ispra, Italy, 2008 - http://forobs.jrc.ec.europa.eu/products/gam/) Upsampled from original spatial resolution of 1 km to 100m and provided as 1201x1201 pixel tiles (Nodata value is 65535).