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The geographic position is an important property of linguistic information in geolinguistics. This paper proposes a Geographic Information System (GIS) based framework for linguistic information management, consulting and analysis. Dialectal information is presented and consulted mainly in graphical format, as maps in linguistic atlases. These atlases are periodically published for each historical region of Romania, but each of them is prepared using different data structures and codification methods. Maps are drawn as graphics without a real localization based on geographic coordinates, which makes difficult further spatial analysis of the linguistic information. In the proposed framework, linguistic information is an attribute of a geographic location benefiting from the advantages of a GIS-based system. In this paper, the framework is briefly described and the data models for geographical and linguistic information are detailed. The GIS-based framework allows future developments as spatial analysis and statistics of linguistic data.