In message , at 14:01:13 on
Sat, 15 Feb 2014, Guy Gorton remarked:
(we've got Google maps and ultrasound detectors - what could go wrong?)

The [lack of] correspondence between various mapping efforts, and where
tube lines actually are, has been discussed quite frequently (on u.t.l
at least). Even when such a maps claims to be geographical, it often
merely relies on "joining the dots" (ie the stations).

A quick look at Google maps ought to make this more obvious, rather than
less, for example here at Ealing Broadway (the District being the most
egregiously wrong): http://goo.gl/maps/xDyNf

Curiosly the Google map does show, as faint lines, the real routes of
the lines.

Yes, that's the point. You can actually see how far the real lines
diverge from the join-the-dots lines.

It is even worse south of Acton Town.

The District Line approaching Ealing Broadway is the worst. And it's
very easy to spot when checking out any "geographical" maps.

Acton Town to Turnham Green (Piccadilly) is pretty too bad though.
--
Roland Perry