

it took me a long time to piece together adding contours to satellite photos. then i discovered nasa's worldwind viewer... now google has added a viewer that's really works well (leveraging their acquisition of keyhole inc).
it's really easy and the basic viewer is free. one nice touch, it includes building terrain for metro areas (using polygon rendering). more advanced features like GPS integration are targeted for premium versions.


(The Man = 40.75477,-119.23642)