[cmarshall]

There's a similar geographically accurate map on wikimedia, but without the simplifications, such as making the section of the circle/district line through from Notting Hill Gate to Edgware Road straight. Removing some of the curves and the other changes, while relatively small, really makes the map easier to read. http://upload.wikimedia.org/wikipedia/commons/0/08/London_Un...

As an aside, there's some details on wikimedia about how the geographically accurate maps are plotted: http://commons.wikimedia.org/wiki/London_Underground_geograp...