On Thu, 09 Apr 2009 08:43:40 +0200, <[email protected]> wrote: > With the relations it would be possible to publish only these new > relations > (so anybody can merge them with the corresponding planet-extract > while also merging other data.) as no existing entities are modified.
This sounds like a brilliant idea. The files with relations only should be small compared to the full planet dumps, so it would be easier to distribute them. > I suggest changing the name to make it clear > what point alt_total refers to and if distance is the 2d or 3d distance > in meters. Names are open to discussion. I'm no native english speaker, so I'd like to hear some suggestions. > Also note that not all nodes with a degree >2 are intersections of 2 > roads. > It may be something else intersecting (e.g. a node with the sign of a > city > may be shared by a road and a polygon surrounding the city or it may be > 2 power-lines intersecting). These could easily be skipped. I'm planning to add a filter function that only selects ways that have certain tags. For example it would only process ways which have some kind of "highway" tag set. > I would be willing to add support for your 3d-distance to the metrics > for ShortestWay and StaticFastestWay and for the 3d-distance and and > alt_difference > to my incomplete metric that involves real physics (car accelerating, > maximum speeds in sharp curves, ...). However for applications like this > later metric alt_difference may be misleading as there may be 2 inclines > and 1 decline between the 2 intersections. As I've written in my other mail I would compute two values: The difference in altitude between just then endpoints and a second and more important value which counts all the contour lines crossed. The second value will be the thing you use for routing. If required I could also add two more values one counting all inclines and one counting all declines. Regards, Hermann _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
