Physiographic regions of the world
The Physio graphical regions according to Nevin Fenneman ( GIS Portrait ) have made of natural spatial units of the global and regional African dimension level, arising from geological and geomorphological factors. The highest outline level contains five "continents ", where paleogeographic and plate tectonic aspects such as Community or non-uniform past the individual continental blocks and their components are not considered. Below the continents to follow this scheme Divisions, Provinces ( provinces ) and Sections ( Sections), according to the nomenclature of the United States Geological Survey.