"Can you actually include all of the detail you'd like to see in the finished product on paper?" [Jeff M. to Ian A.]
Even though not asked of me, I say, yes...but it rarely presents itself as an option. Two examples, however, prove this point:
a. At a nearly completely flat site I worked on 15 years ago, I created 18 greens of distinct quality. Each was a work of art — at least to me. I planned these greens all in adavance because the entire project was handled that way. Sure, I made some tweaks...but as a whole, nearly every one was built by the shaper to nearly exact 6-inch contours drawn on (18) 1"=20' scale plans.
b. At a moe recent project I was fortunate to have 3 ideally suited greens....nothing — absolutely nothing — had to be done to them beyond soft clearing and excavating a core for the sand mix. So, technicaly, the plans showed exactly what nature offered — and therefore the plans matched exactly what we ended up "building".
I think you can draw strong comparisons to some golf course holes/courses and some landscape projects. For many landscape architects the plan is drawn, but specific areas — walks, natural garden areas, ponds, etc. — are often finalized in the field based on a set of plans that is intentionally vauge to accommodate such field adjustments. Rarely, however, do landscape architects work without any plans at all.