[OSM-dev] osmtools first release
Hendrik Siedelmann
hendrik.siedelmann at googlemail.com
Sun Apr 27 16:27:18 BST 2008
2008/4/27 Frederik Ramm <frederik at remote.org>:
> > Instead ways directly consist of a
> > number of points. This should speed up for example rendering to svg or
> > routing by a huge amount.
>
> For routing, it is important to know whether two ways meet at a
> junction or whether they just pass over or under each other. This
> topology requirement is solved by our nodes. If you drop nodes ("the
> completely redundand id<->point assignment is removed"), how do you
> suggest a routing engine should build its routing graph then?
Nodes can still be identified by their lat/lon coordinates. As nodes
are not duplicated in the database this is possible. And routing still
needs to find which ways reference a node, so routing from one way to
another is still complicated. On the other hand checking if another
way uses the same points is fast on a spatial database (I will at some
time provide funktions provide routing)
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