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Darren New wrote:
> I wasn't talking about the size. I was talking about the format. As in,
> how do you represent the paths of the road, the locations of services,
> etc etc, in such a way that the machine can tell you "make the second
> left in X miles". My machine even tells me if I'm on a 5-lane road and
> two lanes are exit-only, drawing the picture and telling me to keep to
> one side or the other.
I would imagine it's some kind of space partitioning method, similar to
how a game engine figures out with world polygons are "near to" where
you're currently standing. ;-)
Actually the video data for displaying the map and the topological data
for route planning are probably seperate. I would guess.
--
http://blog.orphi.me.uk/
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