The Goleta Slough Management Committee's got a neat website with lots of high quality images of Isla Vista's neighbor. Go to:
Goleta Slough Management Committee
... Click on an area of interest on the map, then click on the picture that comes up in the header for a slideshow of that particular map section.
1782 Spanish Map of the Slough Area, Mescaltitlan -- the area of highest Chumash centralized population.