Sven,
Do you actually believe all of the things you read about ANGC, most of which is "fluff".
If a PGA Tour Pro has to rely on anecdotal accounts from other pros in order to understand the greens, he won't be on the PGA Tour for very long.
If anything, criminal attorneys tell us that eyewitness accounts aren't very reliable.
For you to try to convince everyone that golfers remember the exact hole locations on every hole, and how EVERY possible putt broke, dating back for decades, is a myth of near biblical proportions.
What's additionally absurd about your statement is the underlying premise that the greens have remained static over all of those years, when we know for a fact that they are changed, almost on a yearly basis. So, if Greg is telling Bubba how hole # X putted, and I don't think for a second that he is telling anyone, that's misinformation, as chances are, the greens have been changed since Greg putted it years before.
As to the red dot on a schematic, Rae's Creek isn't isolated to a single location, rather, it meanders through the property.
As to why anyone would be interested in its location, the answer is simple, it represents the lowest point on the property at about 49m ASL. The high point on the property is next to the 1st green/2nd tee at 101m ASL. That point is directly north of the low point, with the entire property sliding from high north to low south.
But, don't take my word for it, go ask Larry, Jack, Nick and Phil