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April 25, 2015

Homework Help: Math

Posted by JULIA on Thursday, May 24, 2007 at 3:02pm.

Why do we need to learn topography?

Topographic maps show the hills and valleys. By learning to read a topographic map, you can tell whether a hill is really steep or has a very gradual grade. Check this site for more information.

http://erg.usgs.gov/isb/pubs/booklets/symbols/

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