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 Hugo Ahlenius, UNEP/GRID-Arendal)
ESRI Inc. 1993. Digital Chart of the World. Redlands, USA: ESRI. ESRI Inc. 1992. ArcWorld 1:3M. Redlands, USA: ESRI. NGA. 2000. VMAP 0, Version 5. http://geoengine.nga.mil/ geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html (accessed July 14, 2006) Patterson, T. 2006. CleanTOPO2. http://www.shadedrelief.com/cleantopo2/ (accessed July 20, 2006)