ScottHope:
Do all courses have distance markers in the fairways like this one at Kiawahs first hole?...
...I've hit this one before, which would waste a mapping shot.
Red, white and blue distance markers are pretty standard on most decent courses. Sometimes they're stakes along the edge of the fairway. 100, 150, 200 out.
Hitting one on the fly would actually be quite accurate for carry although distance discrepancies in the tee to green yardages here would probably foul that thinking up. :-)