I hope you all dont mind my asking a question in someone elses thread.

Anyway I looked over the acme/google planimeter site and I am confused. How exactly does this show me how big a watershed in any given area is? When I put points on it, at the bottom I see a bunch of different numbers that make no sense to me save one, where it shows the calculated acreage.

for example..
3.582e+4 m� / 3.582 hectares / 0.03582 km� / 3.856e+5 ft� / 8.852 acres / 0.01383 mile�

Am I missing something?Where is the information about a watershed?