The perceptoscope is an augmented reality device for fixed locations. Before getting too much into the specifics, imagine that you could walk up to a perceptoscope placed near the Empire State building. You look through the eye pieces and you see the city as it was before the building was constructed. At the flip of a switch you can watch the building take shape right in front of you. All this, with true 3D vision and motion tracking.

Here is how to use it: drush -d geocoder-backfill --limit=2500 This patch not only fixes the drush command (fixes the bug where all geocoded values get deleted), but also adds the much needed --limit=NUMVALUE which allows you to limit the geocoding to abide by geocoding (Google 2500/day) quota limits.