- Map History - History of Cartography Homepage: Old maps, early maps - non-current maps in general - are the subject of this site. Worthwhile information about old maps, both on the web and in the real world. Offers comment and guidance, and over 3,500 annotated links - selected for relevance and quality.
- United States Geographical Survey National Map: The National Map is the product of a consortium of Federal, State, and local partners who provide geospatial data to enhance America's ability to access, integrate, and apply geospatial data at global, national, and local scales.
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