Tom Patterson is a cartographer from the US National Parks Service and in his shadedrelief.com cartography website, there is a gallery of birds-eye view illustrations from a number of illustrators (and more). He has a very interesting website for the cartographically inclined.
- Random bonus: Unrealized Moscow - for those who haven't seen these wonderful architectural drawings of soviet structures from 1930s to 1950s that were never built.
- Random note: GooglePrint beta has gone live - search inside books with small batch jpeg pages resulting. It's both a great and thought provoking service at the same time. Do some random searching to get a feel for the scope of the database. 'Illustration' returns 640,000 pages.