Thema Subject Categories 1.4

Previous versions of Thema are still available 1.3 1.2.

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
Use all R* codes for: academic, technical, specialist and general adult titles. DO NOT USE: code ‘R’ itself, but select specific categories from section R*. Use all R* codes with: other subject categories and qualifiers where appropriate, in particular PLACE 1* Qualifiers
1.4
RG Geography
Use all RG* codes with: PLACE 1* Qualifiers as appropriate
RGX Geographical reference works
RGXB World atlases / world maps
Class here: globes and small scale global or continental maps.
See also: NHTP1 Historical maps and atlases, WTR* Travel maps and atlases and its subcategories
1.4
RGXH Geographical maps (specialist)
Use for: specialist / topographical and other large scale maps only. Use with: another code indicating specific subject or application where appropriate.
See also: WTR* Travel maps and atlases and its subcategories
1.4
RGXM Naval and marine charts
Class here: Maritime charts, nautical charts, navigational charts. Use for: detailed charts of inland waterways, coastal waters and maritime shipping routes.
See also: WTR* Travel maps and atlases and its subcategories
1.2 1.4
RGXP Place names and gazetteers

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