Base map



an outline map of an area to which specific information is added for any of various purposes.
Historical Examples

Anyone who attempts to draw a base map must, first of all, know how each feature or part of the map should be represented.
The Preparation of Illustrations for Reports of the United States Geological Survey John L. Ridgway

The application of six of these conventional patterns to a base map is shown in figure 9.
The Preparation of Illustrations for Reports of the United States Geological Survey John L. Ridgway

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