Map Routing, a la Google Maps? *

Question

I've always been intrigued by Map Routing, but I've never found any good introductory (or even advanced!) level tutorials on it. Does anybody have any pointers, hints, etc?

Update: I'm primarily looking for pointers as to how a map system is implemented (data structures, algorithms, etc).

Answer

Take a look at the open street map project to see how this sort of thing is being tackled in a truely free software project using only user supplied and licensed data and have a wiki containing stuff you might find interesting.

A few years back the guys involved where pretty easy going and answered lots of questions I had so I see no reason why they still aren't a nice bunch.

< br > via < a class="StackLink" href=" http://stackoverflow.com/questions/2798/" >Map Routing, a la Google Maps?< /a>

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