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Yes, you could get USGS topographic maps before, but they were in large, cumbersome PDFs that were difficult to find and even harder to print. National Geographic's site gives you a handy GPS map ...
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The USGS says its new digital topographic maps are a “game changer” for hikers, trail runners and other outdoor explorersThe USGS is a scientific agency that studies the landscape of the US, so they’ve been amassing data useful to hikers and ...
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