Great stuff and really interesting - I developed a lot of knowledge of shortcuts on the tube over 20 years of using it. They do like to send you the long way round with the signs! It's nice to visualise some of those shortcuts :)
I'm slightly worried for you however as TFL and the Met seem to be cracking down on any open information about city infrastructure at the moment.
I've just started out at TFL and the goal for open data is far from being cracked down upon, in fact it seems they are trying to make more available, give me a shout if there are any particular problems you've experienced and I'm sure I can try and help out.
Well the service that people have in spy movies where they can instantly access an infinitely zoomable 3D cad model of the entire building - that would be nice ;-)
Yes, I find the signage for the Victoria line at King's Cross is particularly bad - they try to send you around to the east end of the platform for some reason, when the west end is normally much closer. This tool is fantastic for visualising what that comparison actually looks like.
I'm slightly worried for you however as TFL and the Met seem to be cracking down on any open information about city infrastructure at the moment.