I have the feeling this is digitally painted over an aerial photo.
The art is too perfect from that location. Attractions never look best from above (look at google maps).
The overall look from above doesn't represent an artists impression of the rides and how it's perceived.
Take the concept for Hogswarts, it never showed the show building but expanded beyond the park to give the viewer a feeling of how it would look and feel, not how it is.
Still it looks fun...