Brian:
I certainly would classify the routing map hanging on the wall at PV an architectural drawing and plan, both by Colt and also Crump. Although it was the "working routing map" that Crump apparently used for the next five years, it has very detailed contour lines on it and fully developed holes in the exact places, green shapes, bunkers, fairway lines, etc. The booklet containing the individual hole drawings by Colt, however, is far more artistic and sophisticated as an architectural drawing.
I see the mention in Cornish & Whitten about Colt being thought to be the first architectural draughtsman, but I was trying for something more specific than that mention.
It would certainly appear Colt would likely have been the first to do this, probably just after the turn of the century. If there is anything of this kind from Willie Park Jr from Sunningdale old that might have preceded Colt though.