[Routing] Wiki-Page for defining OSM binary file format created

[Tristram Gräbener]

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Hello,

I have the feeling that having data specifically for routing doesn't
troubles you. However plain OSM data is not usable as you don't have
the traditional edge/arc representation (points are only geographical
points and there can be multiple intersections on a single way). How
do you people handle that? Did I miss some nice tool or misunderstood
how data is organized?

When I first thought about having a binary format, I thought about
boost's serialization. Of course this only makes sense if you use
boost::graph (I don't want to launch an other debate on that topic ;)
). The idea was to be able have immediately the graph structure ready
to use without having to build it (it costs some CPU time even on a
full size computer).

This brings me to my real concern: do you really want to have the same
data structure for graphical rendering and routing? Space isn't really
a problem on portable device (1Gb of SD card costs just a peanut),
loading/rendering speed and ram use will be much more problematic.
That's why I think for two uses the data should be duplicated to have
an fast access depending on the needs.

I hope I'm not to much off topic :)

- --
Tristram

On Fri, Aug 8, 2008 at 11:10 AM, Marcus Wolschon  wrote:
>
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>
> Hello everyone,
>
> as this discussion on osm-dev seems to get very unfocused
> I created a wiki-page
> http://wiki.openstreetmap.org/index.php/OSM_Mobile_Binary_Format
> for such a data-format. So we can organize our thoughts on
> the topic and together make this happen.
>
> If anyone does not agree with the basic scope of the format
> (e.g. define an alternative transport), please feel
> free to create a page for it or start working on updating
> the current mobile-binary-protocoll.
>
>
> Marcus
>
>
> _______________________________________________
> Routing mailing list
> Routing at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/routing
>