It was widely reported yesterday that Apple will likely announce at its WWDC in June that the new version of the built-in maps app in iOS6 will not be fed by Google maps. Instead, Apple has developed its own, in-house 3-D mapping database, based on the acquisition of three mapping software companies between 2009 and 2011, Placebase, C3 Technologies, and Poly9.

The stunning 3D image above is from C3, which, according to the company, uses “previously classified image processing technology… automated software and advanced algorithms… to rapidly assemble extremely precise 3D models, and seamlessly integrate them with traditional 2D maps, satellite images, street level photography and user generated images.” The video below shows a flyover of Oslo using C3′s technology.