D&D Outdoor Geomorphs Set 1: Walled City, for $3.95 USD, as of this posting date, for the PDF download.
I am a huge fan of the old Judges Guild map books: villages, islands, castles, etc. However, these are books of static maps, which you flesh out for your campaign -- Most Excellent, IMO! But, they are short on larger cities. I have my homebrewed world, with plenty of cities dotting the maps, but the JG books will not suffice for every city I may need to map out, sooner or later… I am aware of the city map generating dice, but they're tiny, and my eyes are not as good as they used to be. I sat on the fence trying to decide if I should buy this (c) 1977 product, or not. I finally pulled the trigger.
They are rather good, IMO. My plan is to print them out, apply the printed sheets to peel-n-stick vinyl floor tile pieces (12"-squares, for <$1.00 per tile), cover the printed paper with Clear Contact Paper (translucent vinyl shelf liner from Wal-Mart), cut them to shape and size, and then arrange them into city maps, photograph those, then print them out, as necessary. This way I do not have to worry about IP rights, nor am I limited to what someone else designed -- I can make the maps as large, or small, as I need to.
The maps are in light blue ink (can be edited with any image editor program), and they're drawn on standard graph paper grids. Each geomorph section is marked in the corners, where the edges for cutting are located. Some of the pieces are square, others are long, narrower pieces. I am excited to make them up on the vinyl floor tiles so I can make some interesting city maps. The graph paper appears to be around four squares per inch, so they are not too small to really work with, drawing in details, as desired: building numbers, names, interior rooms, etc.
I suspect the blue ink they used, will not photocopy well; early copier machines would not copy the blue ink used on traditional graph paper, which is why they used that blue color: you draw your designs on the graph paper, copy it, and the graph grid disappears. I believe the intent is that you draw in black, over the tops, assemble, and then photocopy your finished maps. I may need to do just that, using water-erasable markers, for my scanner (B&W mode should allow the blue ink to drop out of the images).
To be honest, though, I will likely copy them in color, to keep the blue ink grid, for making measuring that much easier… I'll play with them to see what works out the best for me, and my needs.
For the product's age (45 years!), it is still useful, and surprisingly good! But, I am old-school. It really trips my trigger, as a world/city designing DM. YMMV. When I get the tiles created, I'll come back and post some photo's to share. Cheers!
PS:
As a DM, and as a Player, I really enjoy seeing a map of a fantasy city, even if we only see it once, and never re-visit it again. I have a severe, chronic case of wanderlust, both in my RPG's, and in real life, so maps of cities really set my imagination on fire, and I enjoy the heat… Cheers x 2!