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The creation of a thematic map, use of symbols and the use of cartographic methods are
under theoretical principals. Additionally, creation of thematic maps also respects practical
experience (Vozenilkek, 2004).
The basic terms were also compared with terminological world lexical ontology WordNet.
The term as cartography, map, symbol, sign, choropleth map are included there.
Fig. 8. The classes in CartoExpert ontology in Protégé
