I used topo maps on a couple of properties for literally hundreds of hours. I doubt I could've gotten the hang of the contour lines (the way they flow etc) if I hadn't done that.
Frankly, if you're going to spend that much time on a site I really don't see that you even need to refer to the contour lines on the map. Why bother because what you're looking at on the ground just is what it is!
I used those topo maps about 90% for just distance anyway. The maps I used were the fairly standard 1"=200' which gets pretty simple demarking things distance-wise (for instance a good drive of 268 yards is 4" on the ruler, a short par 3 is 2", a pretty long par 3, 3", a short par 4, 5", a 400yd par 4 is 6", long par 4, 7", medium par 5, 8" and a long par 5, 9".
You get used to that reference pretty quick and my little clear plastic 6" ruler always got a huge workout when I was out there--I went through a lot of those things.
And after a while just looking at all kinds of elevation changes on land long enough and referring to them on the topo you do learn what all the configurations of contour lines on a topo map mean. However, even having done that for hundreds of hours on a few sites I have a feeling if I just picked up a topo map of a property I'd never seen before I'd probably have a hard time relating to the elevation changes on it and what the land really looks like at least in detail.
I'll tell you something I'm pretty sure about regarding PVGC and those topo maps Crump and Colt used. It looks like you can figure out what Colt's modus was with those contour lines and it looks like with Crump in the beginning anyway he really didn't know how to use one very well.
Here's why I say that. For me when I tried to really reference those elevation numbers on those contour lines, they'd drive me nuts and the reason was sometimes you have to follow a contour line halfway across the map before you find the elevation number on it. So what I would do with my topo maps is just spend about a half hour with each one before I used it and write the elevation number on each contour line about every inch or two so I could find the damn elevation wherever I was without having to trace each contour line half way across the map to find its elevation.
It looks to me the way Colt did that at Pine Valley was to just take a couple of contour elevation lines on the PV topo which were probably most representative to him and he would trace all the way along it with his blue pencil. That way he could obviously reference or ballpark what elevation he was at or near more easily.
With Crump, on the other hand, at least in the early spring of 1913 and a couple of months before Colt first arrived when he was doing his initial stick routing of the course, it looks like Crump either wasn't using the elevation lines on the topo or wasn't that sure how to use them easily.
Here's why I say that. On the top of that initial stick routing is one of the few notations I've ever seen anywhere from Crump himself. What that notation says I think is pretty indicative of a couple of things:
It says:
"Am not sure if the greens are
marked on this map as I marked
them on the ground."
G.A.C.
What that means to me is Crump was out there routing and siting everything on the golf course himself and if he was marking the tee positions (perpindicular lines) the LZs (dots) and the green sites (circles) himself on the map or even if someone may've been doing it for him out there it's pretty obvious from that notation that Crump was never all that sure that where he was standing on the property for some green site, for instance, was actually where it was getting marked on the topo map.
That tells me Crump was both doing almost all his own siting and routing right on the ground by just looking at it and that he wasn't that good at understanding the contour and elevation lines on a contour map at that point or even knowing where various spots on the topo map were on the ground.