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* 6 or 7 continents | * 6 or 7 continents | ||
* 12 regions | * 12 regions | ||
=== Physiographic regions === | |||
* a taxonomy of geological regions dividing them into | |||
** Landmass | |||
*** Region/Division | |||
**** Province | |||
***** Section | |||
* see: | |||
** [https://en.wikipedia.org/wiki/List_of_the_physiographic_regions_of_the_world List of physiographic regions of the world (wikipedia)] | |||
** [https://water.usgs.gov/GIS/metadata/usgswrd/XML/physio.xml Physiographic divisions of the conterminous U. S. (USGS)] | |||
** [http://wiki.gis.com/wiki/index.php/Physiographic_regions_of_the_world Physiographic regions of the world (GIS.com)] | |||
=== Geoscheme regions === | === Geoscheme regions === | ||
* classification of regions per continent | * classification of regions per continent | ||
** the United Nations uses "geoscheme" system to define major world regions | ** the United Nations uses "geoscheme" system to define major world regions | ||
* | * see [https://en.wikipedia.org/wiki/List_of_the_physiographic_regions_of_the_world List of Physiographic Regions per continent (wikipedia)] | ||
** below are listed the geoscheme regions per continent | ** below are listed the geoscheme regions per continent | ||
=== Americas === | === Americas === |