Map Reading - All About Benchmarks

Topographic Map Benchmarks.  Read my post at Seattlebackpackersmagazine.com.
 

 When looking at a US Geologic Survey (USGS) map the hiker will find benchmark symbols sprinkled across the topo; these and the many other symbols provide the details of a map. Such symbols represent features such as mines, bridges, dams and many more items. To see a complete look at symbols visit the USGS site for more information.
 

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