[time-nuts] Imagery position accuracy

[lists at lazygranch.com]

Bing birdseye tech uses Pictometry. They have a few papers on their position accuracy. Perhaps conflicting papers. One shows the RMS error of 0.6ft. Another shows a 95% confidence level at 2.8ft. This is on 4 inch resolution imagery.

In any event, if your city uses the service, you possibly could get the planning department to provide accurate position data.  

http://www.pictometry.com/index.php?option=com_content&view=article&id=75&Itemid=84