I wish Google Earth would up date more often. The view is from last year. It gives an idea of the size of things but not much more.
My grandkids tried to sneak a peek from one of Screamn' California's peaks on our last trip.
If you search for "disney california adventure" + map you will find some fun maps, concept drawings and superimposed pictures with Carsland. Keep in mind that the plans for Carsland changed a lot since the first announcement so many are not correct.
The official Disney Blog (link) has a concept art that is interesting, of course it really depend on what you're looking for since even the park maps are not to scale or anything, and are very stylized.