[Routing] generalized routing format

[Marcus Wolschon]

On Thu, 16 Oct 2008 11:09:39 +0200, Frederik Ramm <frederik at remote.org>
wrote:
> I would be interested in defining a chain of processing steps that  
> lead from an OSM file to the binary indexed whatever structure, and  
> then find the point in that chain where a lot of the "expensive"  
> processing has already been done but decisions about the final format  
> are still open. Some kind of "intermediate routing graph format". 
...
> 
> I don't think that we'll manage to find a "final file format" that  
> many routing applications will share.

Hello Frederic,

what about doing both.
Finding a simple, easy to understand format that can already be used
for routing but does not loose information yet. This can easily be
used as an intermediate format but tools have the ability to already
use it directly.

* indexed
* marking or separately indexing
** ways that are drivable (highway, cycleway,.. but not river, forest,
power-lines,..)
** nodes that are of order >2 if you only consider drivable roads
** marking or somehow prefering a fixed set of attributes that are most
important for routing
   (e.g. "highway", "maxspeed", "name", "access")

Marcus