Using my mechanical pencil to point on the topographic map, I said: "We think the contact runs right through here". He looked at me with a grin, saying "Well, you should go ahead and draw the ...

A map of Chicago, Illinois, imprinted in 1913 from the United States Geographical Survey’s historical topographic map collection. Image courtesy of the USGS Map lovers, rejoice! The United ...

OFFICIAL large-scale maps are available for comparatively few parts of the world outside western and central Europe, including the British Isles, the eastern United States, India, much of Burma ...