This reminds me that I really ought to dabble back into map making. As a 5 year old I used to stick A4's sheets together to create entire regions (one grew to around 30 sheets), detailing roads, motorways, railway lines, shopping centre, historical districts, etc...
I also a few years ago made an attempt to create a 2012 London Underground map....only for 1 week later Transport for London to produce an official version.
What I wish to do once I have finished all the bloody work I have at the moment, is to take the London city proper and London metro area rail maps and combine them. Currently both are seperate and both have 600+ heavy rail stations, ie 1,200 heavy rail (ie no trams or light rail) stations. I also hope to create four other variants. One being geographically accurate over a satellite image, another in the circuit-form showing u/c, approved and proposed lines, another showing old disused lines and another combining disused lines, current lines and new lines. The later of the maps I suspect would cover some
2,500+ heavy rail stations and I suspect my reasonably powerful laptop will struggle to pull together such a vast 'plan'. Infact thinking about it is crazy - 600 stations on one map is mad as it is, multiple that by 4 and I think I'd have to probably be unemployed to get it finished. That said, can anyone suggest such a program that could handle such quantities (I'm a geography student at uni and I can get highly accurate GIS data/images pretty easily) and would operate on what is a reasonable spec laptop?