I have been experimenting with Google Maps for the Casefile Clues column that I'm wrapping up.
This image includes some of the locations relevant to a 1910 census entry for my wife's great-great-grandfather Louis Demar. He was living 42 West 119th Street in 1910--which is one of the places shown on the map. The other places were important for other reasons and all play a role in completely and accurately analyzing this census entry.