Aerial photography : http://www.terraserver.com/imagery/image_gx.asp?cpx=-113.5968827&cpy=53.47828798&res=8&provider_id=320&t=pan Map subscription model (time-based) : http://www.terraserver.com/subscribe/subscribe.asp

Books versus other supports (like interactive information maps?) : http://www.thegreatideas.org/34w/TGIO288.pdf ... "new technologies will render obsolete many kinds of books, like encyclopedias and manuals... with the advantage that it permits cross-references and nonlinear retrieval of information.

"There's no limit to what a man can do, or where he can go, if he doesn't mind who gets the credit." - Eric Brill, Microsoft Research.