The USGS publishes free topographic maps that show trails, rivers, and campsites in great detail for hikers, cyclists, and ...

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Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. NASA and its partners at Japan’s Ministry of Economy, Trade, and ...

A map of Chicago, Illinois, imprinted in 1913 from the United States Geographical Survey’s historical topographic map collection. Image courtesy of the USGS Map lovers, rejoice! The United States ...

iOS (jailbroken): Google's new Maps app for iOS is pretty great, but it has one hidden feature that makes it even better. Here's how to enable hidden topographical maps on your jailbroken iPhone. This ...

Instead of sending out teams with surveying equipment on the ground, the process uses high-performance computing to transform satellite images into highly accurate 3-D elevation models, or ...