[OSM-dev] osmtools first release - nodeID

Hendrik Siedelmann hendrik.siedelmann at googlemail.com
Sun Apr 27 16:58:30 BST 2008


2008/4/27 Marcus Wolschon <Marcus at wolschon.biz>:

>  | 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)
...
>  So the system cannot know the difference between 2 ways sharing the same
>  node and 2 ways with 2 nodes that just share the same coordinates?
>

Yes for the database it's the same. On the other hands if two nodes
share the same coordinates they should be joined (Thats what I read),
so there will never be two nodes at the same coordinates. (At least in
theory)




More information about the dev mailing list