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—date back ...
I normally bring three types of topographic maps: a paper small-scale overview map, paper large-scale detailed maps, and digital maps (sometimes including additional imagery or data) on a smartphone.
Two years ago, a mountain biker, frustrated because he could not find free, official topographic maps online, submitted a Freedom of Information Act request to the U.S. Geological Survey. After USGS ...
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