USGS Historical Maps

This map explorer, designed by the U.S. Geological Survey, overlays years worth of digitized historical topographic maps onto a neutral basemap of the United States. This map is very clear and user friendly ⎯ simply type in a U.S. location, and then click a place on...

Pizza Place Geography

Statistician Nathan Yau’s Flowing Data site was introduced to us via a specific project: this map of pizza place geography in the United States. The map isn’t interactive, yet it communicates data extremely clearly, thanks to the side-by-side comparison of map layers...