I've been reading some posts recently that asked about the
availability of a geographical underground map. FYI, I have designed a
flash animation with collaboration with the London Transport Museum
that shows the relationship between the London Underground Map, a
geographical map and shows a streetmap too - just in case there are
any doubters. Just thought you might find it interesting...
Click on the link to The Real Underground at:
http://www.fourthway.co.uk