WASHINGTON DC — Hikers, hunters and other outdoor recreationists will be pleased to know that free digital topographic maps are now available online from the U.S. Geological Survey.

For outdoor lovers, no map is more iconic – or useful – than a USGS topo map. While the concentric, sepia lassos of elevation are the maps’ visual signature, their real power is the cross-referenced ...

During the latter half of the twentieth century, the backbone of the U.S. Geological Survey’s national mapping effort was the 7.5-minute topographic quadrangle. These detailed printed maps defined ...