Sarah Hoffmann <[email protected]> writes: > Hi, > > On Wed, Jan 15, 2014 at 03:31:04PM +0100, Rodolphe Quiédeville wrote: >> So if I write here it's because I maintain a nominatim serveur for >> geocoding on a bbox that covers Europe, so I loaded it with an export >> from geofabrik (thanks to them) and now run hourly update on it. If I >> well understood, the update process load worlwide datas in the database, >> so I propose to add an option --bbox to Nominatim to filter the >> changes. The option will have the same structure as osm2pgsql and the >> value will be set on osm2pgsql command line using it's option '-b'. >> >> Before doing the patch, I wanted to discuss it about you, what do you >> think about and have you some hints ?
Hi Sarah, Thanks a lot for your answer. > There is no general objection to adding such a parameter but you should > be aware that the bbox option in osm2pgsql might actually do less than what > you want. It only filters node objects, ways and relations are still imported > completely. Most of the time, this will do what you want because without > nodes outside the bbox, the geometry for the ways and relations cannot be > computed and without a geometry, the objects should not appear in the > Nominatim tables. However, osm2pgsql's slim tables will still grow with > the unnecessary data. Thanks to precise this point on osm2pgsl, even if we'll still have unecessary data we'll have less than doing nothing. > If daily updates are sufficient for you, you should try Geofabrik's > daily diffs[1]. They work well with Nominatim and will avoid the > problem of bloated tables. The setup is described in the installation > instructions. I didn't know this process, it's good to know it. Our bounding bow is a little larger than europe, we way soon integrate some of north african countries, so it will be easy for use to use a larger bbox, even if it's not perfect we'll won't import datas from 2 contient, it's the first step. I'll prepare a path, and do a PR when ready. I'll also open a ticket on Trac to inform other on my work. Best regards -- Rodolphe Quiédeville Expert Tsung - Consulting en performance des SI Tel : 06 13 79 63 41 http://blog.rodolphe.quiedeville.org _______________________________________________ Geocoding mailing list [email protected] https://lists.openstreetmap.org/listinfo/geocoding
