Steve:
Here's a technical little tid-bit regarding old aerials. We, at GMGC probably have about ten of them from the 1920s and 1930s from an aerial photographer by the name of Victor Dallin who apparently took aerials of every golf course in my region (and a few other regions) back then. One in particular, is extra valuable because Dallin managed to get at just the right altitude and apparently squarely in the middle of the course and take a shot straight down, sans leaves on trees and apparently around high noon. Recognizing the exact lengths and widths everywhere on the course is so easy with that one.
After a couple of years I got to thinking how exactly Dallin took a shot like that which appears dead straight down so I called the archivist at the Hagley Museum in Wilmington De. and asked him if he could shed some light on that. He said sure he could because they also have photos of Dallin's plane and he actually had a hole cut in the bottom of it where the camera would set in!!
There're also some computer applications that can really highlight the details and particulars of those old photos---are you using one of those applications?
By the way, I said in a post above I basically got interested in golf architecture after being told about those Dallin aerial photos by somebody whose name I couldn't recall after a tournament at Manufacturers. It turns out that person who told me about the aerials and got me into all this was Doug Larson, the former superintendent at Manny's. Thanks, Doug, I don't know how to repay you but one way I can is to never introduce you to my wife!