Physical map of Guiana Shield, a craton located in South America, between Brazil, French Guiana, Suriname, Guyana, Venezuela and Colombia.
Own work. Source :

Topography : NGDC ETOPO1 data (public domain)
Bathymetry : NGDC ETOPO1 data (public domain)
Coast line : NGDC GSHHS data (public domain)
Rivers : NGDC World Data Bank II (public domain)
Borders of Guiana Shield : Gibbs &amp; Barron, 1993, and georeferencing.pdf from the Smithonian National Museum of Natural HistoryAdditional data :

Cartographic projection : equirectangular projection
Geodetic system : WGS84
Sémhur (talk)