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).

To be sure, printed maps from the USGS still come with a fee. But a download of the agency’s cartographical creations, which open in Adobe Acrobat as PDF files, is as simple and free as a few ...

USGS topo maps have been available digitally since 2008, but until now the lack of complete mobile support has handicapped the collection. Just in time for mosquito season, Trimble Outdoors has ...

TOPO! features maps created by National Geographic and the U.S.G.S, and each map sports five lvels of detail. The mapping software enables you to view 1:24,000 and 1:100,000 scale topographic ...

It just got way, way easier to search and browse the US Geological Survey’s collection of historical topographic maps, thanks to a new online map viewer.These maps—more than 178,000 of them ...

The Accuterra topo map will get a slide-out control panel in version 3.1. Screenshot by Jessica Dolcourt/CNET As a wannabe weekend warrior, I'm happy to see topographical maps for mobile phones ...

With the release of new US Topo maps for Illinois and South Dakota, t he USGS has completed the second, three-year cycle of revising and updating electronic US Topo quadrangles. Since the project’s ...

It’s part of its Outdoor Maps+ service, which improves on the TOPO maps built into the Fenix, Epix, and other premium devices. It costs $49.99 a year to upgrade, and it’s US-only for now.