The Global Human Footprint Dataset of the Last of the Wild Project,
Version 2, 2005 (LWP-2) is the Human Influence Index (HII) normalized by
biome and realm. The HII is a global dataset of 1-kilometer grid cells,
created from nine global data layers covering human population pressure
(population density), human land use and infrastructure (built-up areas,
nighttime lights, land use/land cover), and human access (coastlines,
roads, railroads, navigable rivers). The dataset is produced by the
Wildlife Conservation Society (WCS) and the Columbia University Center
for International Earth Science Information Network (CIESIN).