Thema Subject Categories 1.3

Previous versions of Thema are still available 1.2 1.1 1.0.

Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.

See the search hints below.

Notation Category heading Add Mod ?
R Earth Sciences, Geography, Environment, Planning
RG Geography
Use with: (all RG* codes,) PLACE Qualifiers 1* as appropriate
RGB Physical geography & topography 1.3
RGBA Arid zones, deserts
RGBC Plains & grasslands
RGBD Tundra
RGBF Wetlands, swamps, fens
RGBG Rivers & lakes 1.3
RGBL Forests & woodland
RGBP Coastlines
Class here: deltas, estuaries, fjords. See also: RBK* Hydrology & the hydrosphere and its subcategories
RGBR Coral reefs
RGBS Mountains
RGBU Glaciers & ice caps 1.3

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