Ah, unlike you guys, I run a digital print studio with a large format printer, and I'm also a professional fantasy cartographer, so creating map tiles or full scale maps of a single site is no big deal for me - I know I'm spoiled!
I usually print all my maps at full scale, sometimes up to 36" x 48" in full color.
I can also create a semi-photo-realistic encounter map that fits those dimensions with grids placed in about 4 hours, though I prefer to do hand-drawn combined with digital content maps which take double that to create. I do both for RPG publishers professionally - as well as my own soon to be published adventures (see the News and Products board for
Kaidan: a Japanese Ghost Story setting.) The first adventure features 10 maps - some hand-drawn, some photo-realistic.
I'm still creating maps for adventures 2 and 3, but have a half dozen ready so far. There will be ship maps in the setting handbook not in the adventure, as the adventure begins with the party's arrival by ship, and no need for the ship for actually adventuring...
Sorry for the slight threadjack - just maps are at the center of my publication, moreso than most competitor's products (my extra edge...)
GP