Re: [OSM-dev] Bulk downloading of Mapnik tiles
Hello Dirk-Lüder, Monday, March 16, 2009, 7:45:30 PM, you wrote: So, is bulk downloading as described above allowed? DLK Probably not Ok, I'm trying to set up my own Mapnik server now... ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
[OSM-dev] Bulk downloading of Mapnik tiles
I'd like to download a portion of the OSM map tiles (from tile.openstreetmap.org) for offline usage /and/ to offload the OSM server for the projects where I'm using OSM maps (which are used by several users). Currently the area of interest contains 587001 tiles at zoom level 18. Is it okay if I download all tiles using a custom script? To keep the load for the OSM servers at a minimum I would only use a single thread PHP script and keep the HTTP connection between requests alive so that unnecessary TCP overhead is avoided. Once downloaded all tiles, I would then keep them up to date by using the changes request of the OSM API. Later I will probably extend the area to central Europe but then it's probably better to install my own Mapnik renderer. However, for the moment this seems a bit too complicated to me and I need the finished tiles for offline usage anyway. So, is bulk downloading as described above allowed? Udo ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Bulk downloading of Mapnik tiles
Udo Giacomozzi schrieb: I'd like to download a portion of the OSM map tiles (from tile.openstreetmap.org) for offline usage /and/ to offload the OSM server for the projects where I'm using OSM maps (which are used by several users). Currently the area of interest contains 587001 tiles at zoom level 18. [...] So, is bulk downloading as described above allowed? Probably not, because lots of the tiles would need to be rendered especially for you. tiles.openstreetmap.org basically only renders tiles that are looked at at all, so bulk-requesting areas will force large areas to render to the highest detail. So either you put up a tileCache, or, better yet, render tiles yourself. It's not *that* hard to set up if you have your own server. This is not official word on this, the admins (like TomH) get the last say on this. -- Dirk-Lüder Deelkar Kreie Bremen - 53.0952°N 8.8652°E signature.asc Description: OpenPGP digital signature ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Bulk downloading of Mapnik tiles
Probably not, because lots of the tiles would need to be rendered especially for you. tiles.openstreetmap.org basically only renders tiles that are looked at at all, so bulk-requesting areas will force large areas to render to the highest detail. Not true, AFAIK. Tiles are rendered as a whole once a week. I think there is a confusion with t...@h (tah.openstreetmap.org) - Chris - ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Bulk downloading of Mapnik tiles
2009/3/16 Stephan Plepelits sk...@xover.htu.tuwien.ac.at: On Mon, Mar 16, 2009 at 08:34:19PM +0100, Chris Browet wrote: Probably not, because lots of the tiles would need to be rendered especially for you. _ t_ i_ l_ e_ s_ ._ o_ p_ e_ n_ s_ t_ r_ e_ e_ t_ m_ a_ p_ ._ o_ r_ g basically only renders tiles that are looked at at all, so bulk-requesting areas will force large areas to render to the highest detail. Not true, AFAIK. Tiles are rendered as a whole once a week. I think there is a confusion with t...@h (_ t_ a_ h_ ._ o_ p_ e_ n_ s_ t_ r_ e_ e_ t_ m_ a_ p_ ._ o_ r_ g) No, it's true. The tiles are rendered on demand, using mod_tile. So if nobody looks at a tile, it's not being rendered. Rendering everything to the highest detail would take awful long. Every Wednesday the database is updated to the newest version, from that time on you get new tiles (or if the load is to high still an old version or no picture if it has never been rendered before). greetings, Stephan Still not quite. It's updated hourly now. And I had a feeling that it updated larger 8x8 metatiles at a time. I had a feeling that it cascaded down zoom levels, but it doesn't seem to be documented if so. -- Regards, Thomas Wood (Edgemaster) ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Bulk downloading of Mapnik tiles
Chris Browet schrieb: Probably not, because lots of the tiles would need to be rendered especially for you. tiles.openstreetmap.org basically only renders tiles that are looked at at all, so bulk-requesting areas will force large areas to render to the highest detail. Not true, AFAIK. Tiles are rendered as a whole once a week. I think there is a confusion with t...@h (tah.openstreetmap.org) t...@h is the project that renders everything in advance. Udo could talk to Sebastian Spaeth if he wants tiles from there, he takes care of the tah server, I'm just a client-side dev. -- Dirk-Lüder Deelkar Kreie Bremen - 53.0952°N 8.8652°E signature.asc Description: OpenPGP digital signature ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Bulk downloading of Mapnik tiles
On Mon, Mar 16, 2009 at 8:21 PM, Thomas Wood grand.edgemas...@gmail.com wrote: And I had a feeling that it updated larger 8x8 metatiles at a time. I had a feeling that it cascaded down zoom levels, but it doesn't seem to be documented if so. Yep, mod_tile does metatiles, but it doesn't do any zoom-level cascading. Cheers, Andy ___ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
