USGS topographic maps provide a lot of information to the hiker by the use of symbols and bench marks.
Check out my post at www.seattlebackpackersmagazine.com about the symbols found on a USGS topo.
Go here for my post.
To learn more about topographic map contour lines go here.
Map, Compass & GPS
Wild flowers along Fall Creek on the way to the Green Lakes - Oregon
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