Using scanned maps and data from the United States Geological Survey (USGS), Esri developed an interactive tool to explore topographic maps of the US.

The most complete digital topographic ever made of the Earth was released by NASA today (Oct. 17). The map, known as a global digital elevation model, was created from images collected by the ...

Topo USA can display more than one map by using a split screen. As we've reported in the past, TopoUSA imports DeLorme's TopoQuad maps (about $100 per state).

You East Dillon fans may have something to say about Texas.