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Triangulation diagram, vicinity of Washington, D.C. : October 1958.
Relief shown by contours and spot heights. Alternate title in upper margin: Washington and vicinity. Alternate title in lower right margin: Vicinity of Washington, D.C. "Base map by United States, Department of... More
Triangulation diagram, vicinity of Washington, D.C. : September 1962.
Relief shown by contours and spot heights. Alternate title in upper margin: Washington and vicinity. Alternate title in lower right margin: Vicinity of Washington, D.C. "Base map by United States, Department of... More
Triangulation diagram, vicinity of Washington, D.C. : August 1966.
Public domain scan of a 17th-18th-century map, vintage, old, free to use, no copyright restrictions - Picryl description.