This map shows the land surface resized by its population overlaid with data about biodiversity hotspot regions. Each transformed grid cell in the map is proportional to the total number of people living in that area.
This map uses population estimates for the year 2020 based on data from the Gridded Population of the World (GPW), v4 at 0.25 degree resolution, released by SEDAC (Socioeconomic Data and Applications Center). The map overlay is based on data by Conservation International provided at Spatial-Analyst (accessed 2012).
The biodiversity hotspots that are used in this map were described in the following publication:
Mittermeier, R.A., P.R. Gil, M. Hoffman, J. Pilgrim, T. Brooks, C.G. Mittermeier, J. Lamoreux & G.A.B. da Fonseca. 2005. Hotspots revisited. Chicago, IL: The University of Chicago Press.