Forrest,
Can you recommend any good books on the subject?
Peter,
Despite missing 30 posts, I will say that the experience and craft of routing hasn't changed a lot in essense. It takes time, good maps, lots of site walks, and the experience and talent to do a good routing. None of that has changed substantially. I believe map making was well established as a craft, so we all had the basic maps to work from, although I suspect they are getting somewhat more accurate, so we may use more maps and fewer site walks. But, the site walks are still essential!
I tell the story of how I used to letter routings, but went well beyond Z often enough to change to a numbering system. In a recent presentation where I decided to do a routing to help sell the job, I labeled it "5 of X" for the presentation. I wonder how Bendelow, or even Old Tom got routings done in a day or so. Just by information at hand and time spent, I would have to think that on par, modern routings are better than some of the old ones. But, the best courses of the old days have either been changed, or took more time initially.
As noted somewhere in this thread, finding the best routing (although there may be several nearly as good for any site) probably takes about the same amount of time and effort. Its just best if that effort is put into it before any construction begins, rather than some of it coming after.
There are other changes over the years. Someone will surely note environmental areas, but I think that about brings us back full circle. The old guys probably avoided swamps because they couldn't build in them rather than because of regulations. Its only been a short period of time - say from 1950 on that it was economically feasible to build through wetlands, Lido and a few other minor examples excepted. I think the earthmoving technology was probably capapble - look where railroads built for example - to deal with tough ground, its just that the budgets probably weren't there for a non profit venture.
If you look at Charlie's example of the par 3, it shows some subtle differences between old days and now. That hill is an okay place for a green, providing the gca knows that he has the earthmoving capability of lowering the green into the hill rather than setting it right on top. In the older days, that green might not have been sited quite so high, nor would it have been sited mid slope, if the slope was steep, where it probably would look better than sitting on top of that little knoll.