1. Find a rooftop anywhere in the world.
Type in an address below and hit GO!, or, just use the map controls to zoom to a roof.
2. Draw a box over the roof.
Click on each corner of the roof (clockwise). If you click on the wrong spot, you can drag the corners to the right spot, or, start all over again by clicking on the "Start Over" button. Click on the "Finished" button when finished.