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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Sumatran orangutan distribution shapefile prepared by Singleton and Wich and based on Wich et al. 2008 with unpublished data added.
Elevation shown is SRTM 90M DEM available from the CGIAR website (http://srtm.csi.cgiar.org/).
Uploaded on Wednesday 01 Feb 2012
Riccardo Pravettoni, UNEP/GRID-Arendal
The Bukit Barisan mountain range that runs down the full length of Sumatra reach altitudes of over 3,000 meters above sea level (m asl), with the highest peaks being Gunung Kerinci in West Sumatra (3,800 m asl) and Gunung Leuser (3,404 m asl) in Aceh. Sumatran orangutan habitat is primarily in lowland areas. The highest densities are found below 500 m asl, but individuals can still be encountered on occasion as high as 2,000 m asl.