Question
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/
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/