GIS Dictionary

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  1. [data analysis] A map that provides background reference information, such as landforms, roads, landmarks, and political boundaries, onto which other thematic information is placed. A basemap is used for locational reference and often includes a geodetic control network as part of its structure.
  2. [data analysis] A map to which GIS data layers are registered and rescaled.
  3. [data analysis] In imagery, a collection of geometrically correct imagery used as the backdrop for GIS layers.

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