when you fly down to the ground, and you see this kind of panoramic imagery, the first thing that you might notice is that it's not just a picture, there's just as much three-dimensional understanding of this environment as there is of the three-dimensional city from above, so if i click on something to get a closer view of it, then, the fact that that transition looks as it does, is a function of all of that geometry, all of that 3d understanding behind this model.