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 Historical Topo Map Explorer allows users ...

A topographic map introduces you to the peaks and valleys ... “Sometimes, even software updates can zap your saved maps,” he told us. “Plus, a printed map doesn’t need batteries.” ...

THE practical problems involved in the interpretation of geological and topographical maps are here dealt with in a manner likely to appeal to students of geology and civil engineering.