[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.
[data analysis]
A map to which GIS data layers are registered and rescaled.
[data analysis]
In imagery, a collection of geometrically correct imagery used as the backdrop for GIS layers.