Wondering if anybody knows of a good online source that has fairly detailed historical topography of near NW OKC, especially around the Venice neighborhood? Heard there used to be a creek running where Venice Blvd is today, and have poked around in the library's collections, but the maps there were either too zoomed out or just had structures (the Sanborn maps) and not much topography (one of the Sanborn maps just had a blank space where the Venice neighborhood is, then the next chronological one already had Venice Blvd). Doug Dawgz blog had some, but they weren't too helpful (the larger images that would've helped came up with 404 errors).