Wikipedia has a nice and extremely useful map of the Beijing metro system with upcoming extensions. As the Beijing metro system is expanding extremely rapidly the future is almost now.
Like most Wikipedia maps of this type it is made in SVG (using Adobe Illustrator). The code it generates it fairly decent, better than some code I have seen earlier, but still hard to read and use for my purpose, so I cleaned it up with Kommodo Edit. The regular expressions work well in that editor, which makes clean-up much quicker and easier.
Maps are, or at least should be, ideal for SVG and SVG animations. Famously they are not the territory, but they are a layer of information that can be used instead of or as an overlay to other maps of the territory, highlighting the information you are looking for and hiding the information that distracts. …
If you are on the route from here to there, first of all future extensions are of no use, and neither are current lines if they are not going to take you there. Stations you enter and leave the system is important, as is the transfer stations. Stations before the important stations are useful as well, to prepare for leaving at the next station.
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