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Old 23-May-2016, 1:22 PM   #12
Antennas Direct Tech Supp
Join Date: Jan 2010
Posts: 2,932
The final authority would be a USGS topographic map of your area that might be at your local library.
USGS topo maps are available online at

The site is slooooowwwwww and some of the tools are a bit obtuse, but what to you expect from a government agency.
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