accurate to about square mile approx 640 acres
http://www.nohrsc.noaa.gov/interact...ight=450&nw=800&nh=450&h_o=0&font=0&js=1&uc=0
http://www.nohrsc.noaa.gov/interact...ight=450&nw=800&nh=450&h_o=0&font=0&js=1&uc=0