Google has just released a new feature for StreetView that looks pretty simple, but it actually quite complex and intuitive. When viewing anything in StreetView, you’ll notice your is in the shape of an oval or a rectangle. When it’s an oval, you can double-click to quickly move to that location. When it’s a rectangle (usually on building facades), you can double-click to be taken to the best view of that area.
Google was able to accomplish this using some slick methods, as explained on the Lat Long Blog:
We have been able to accomplish this by making a compact representation of the building facade and road geometry for all the Street View panoramas using laser point clouds and differences between consecutive pictures.