[Tilesathome] planet.osm based lowzoom ?
frederik at remote.org
Tue Jun 19 09:21:39 BST 2007
> I also think it might be easier (less strain for the server and less
> dependency on it being up), to use the weekly planet.osm for low-zoom
> generation. We could strip this file to reduce it for low-zoom
> needs and
> for low-zoom requirements it should be current enough...
It probably is, but there lies an interesting challenge in trying to
be "more current" than the latest planet dump. The API doesn't give
us large sections of its data, and API as well as the dev server are
the bottlenecks in tiles at home.
It would be possible to have t at h clients filter the OSM data they
download using a "lowzoom filter", resulting in a (likely very small)
parcel of lowzoom-relevant data inside the level_12 tile being
rendered. This data set could be uploaded to a lowzoom server. The
lowzoom server would be primed using the planet file once a week, but
would use these messages received from t at h clients for incremental
updates, thus offering better data than just using the planet file.
Of course it would all be much easier if we'd have some kind of
filtering mirror facility for the OSM data itself like it has been
suggested by a number of people, including myself ;-)
Frederik Ramm ## eMail frederik at remote.org ## N49°00.09' E008°23.33'
More information about the Tilesathome