Online Sectional Maps . . .
Here's a website that allows scrolling over all the U.S. Sectional Maps which is great for finding antenna towers. There will be two numbers printed on the map in the vicinity of the tower symbol. One number is the altitude of the tower above sea level (MSL) and the second number is the tower's height above the ground (AGL). http://skyvector.com/
NickD

BASE 194