Rouxthless
Member
I finally found a free tool online that you can use to plot points (as many as you need, in any shape) on Google Maps/Satellite images to calculate the size (in acres, square feet, and more) of the land you selected. I used it on a known piece of property and it was very accurate for me.
http://www.daftlogic.com/projects-google-maps-area-calculator-tool.htm
http://www.daftlogic.com/projects-google-maps-area-calculator-tool.htm