Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case Riccardo Pravettoni, UNEP/GRID-Arendal)
Hillshade generated from SRTM 90m DEM available from the CGIAR website (http://srtm.csi.cgiar.org/). Bathymetry from the ETOPO1 Global Relief Model downloaded from: http://www.ngdc.noaa.gov/mgg/global/global.html Sumatran orangutan distribution shapefile prepared by Singleton and Wich and based on Wich et al. 2008 with unpublished data added. Water catchments for northern Sumatra digitized by PanEco/YEL, based on SRTM 90m DEM and 1:50,000 Topographic maps (25m contour interval).