Re: [OSM-talk] Mapnik at zoom=19
On 27-1-2013 17:23, Martin Koppenhoefer wrote: current XML would render sufficiently well when you remove the minscale_zoom=18 filters. If "convincingly" implies different The minscale_zoom18 essentially translates to 'infinity' in the current stylesheet setup: The difference between z18 and z19, apart from scale considerations, is non-existent. Apart from taking storage requirements into account, you could well switch to z19 today. -- Lennard ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
A quick extrapolation re space is to take rendered zl18 tile size, in total, and multiply by 4. If someone can provide the zl18 number ... It seems reasonable to expect zl19 tiles to be of most interest in urban areas with high POI density, as those areas tend to drop display data due to labeling/feature densities. While it is possible that a bot could cause all zl19 tiles to be rendered and consume significant tile cache space, if this has not happened to date on the existing tile server then it will likely not happen with zl19 either. Be aware that code changes may be required to support higher zoom levels as I have a vague, and quite likely outdated, recollection of arrays in mapnik (?) and/or the rendering stack needing expansion. On Sun, Jan 27, 2013 at 9:02 AM, Martin Koppenhoefer wrote: > 2013/1/27 Richard Fairhurst : > >> Space requirements depend mostly on the actual usage (how many of them > >> would be created). I guess it wouldn't make sense to prerender them > > > > > > "I guess" is nice for mailing lists, but the sysadmins can't be asked to > > make decisions based on a guess. Evidence is more helpful. > > > in my tests zoom 19 took roughly the same time than the zoom 18 tiles > but actual requirements (space and time) will depend mostly on how > intensively people will use this feature on osm.org. This is hardly > testable or predictable. > > cheers, > Martin > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- John Novak 585-OLD-TOPOS (585-653-8676) http://www.linkedin.com/in/johnanovak/ OSM ID:oldtopos OSM Heat Map: http://yosmhm.neis-one.org/?oldtopos OSM Edit Stats:http://hdyc.neis-one.org/?oldtopos ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
2013/1/27 Richard Fairhurst : >> Space requirements depend mostly on the actual usage (how many of them >> would be created). I guess it wouldn't make sense to prerender them > > > "I guess" is nice for mailing lists, but the sysadmins can't be asked to > make decisions based on a guess. Evidence is more helpful. in my tests zoom 19 took roughly the same time than the zoom 18 tiles but actual requirements (space and time) will depend mostly on how intensively people will use this feature on osm.org. This is hardly testable or predictable. cheers, Martin ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
On 27/01/2013 16:23, Martin Koppenhoefer wrote: IMHO there is no connection between the port to a different style sheet language and the decision which zoom level gets rendered. The connection is that the current stylesheet is abandonware. If anything is to be fixed then it'll be in the Carto port. Space requirements depend mostly on the actual usage (how many of them would be created). I guess it wouldn't make sense to prerender them "I guess" is nice for mailing lists, but the sysadmins can't be asked to make decisions based on a guess. Evidence is more helpful. cheers Richard ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
2013/1/27 Richard Fairhurst : > Gervase Markham wrote: >>> Who do we need to talk to or where do we need to file a bug to get this >>> request considered officially? >> Anyone? > > If you want to make it happen, the best way to do this is to take part in > the project to port the current stylesheet to Carto: > https://github.com/gravitystorm/openstreetmap-carto > > and to make sure that the resulting stylesheet is actually capable of > rendering at z19 convincingly. (The current XML one isn't.) IMHO there is no connection between the port to a different style sheet language and the decision which zoom level gets rendered. The current XML would render sufficiently well when you remove the minscale_zoom=18 filters. If "convincingly" implies different font-sizes and styles, line widths etc. for the step from 18 to 19, this is something that could be fixed in later iterations. > Beyond that, it'll take some investigation into what extra hardware burden > z19 will impose. Perhaps you could help by running some tests into that? Space requirements depend mostly on the actual usage (how many of them would be created). I guess it wouldn't make sense to prerender them and rendering on the fly seems to work quite well as there is much less data than even in zoom 18 which already renders fast. On data changes in the area they could be dropped instead of putting them into a dirty queue. cheers, Martin ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
Gerv, You may want to cross post to the broader talk list as well, as I have heard rumors of work related to this but have no knowledge regarding status. Best On Sun, Jan 27, 2013 at 3:39 AM, Richard Fairhurst wrote: > Gervase Markham wrote: > >> Who do we need to talk to or where do we need to file a bug to get this > >> request considered officially? > > Anyone? > > If you want to make it happen, the best way to do this is to take part in > the project to port the current stylesheet to Carto: > https://github.com/gravitystorm/openstreetmap-carto > > and to make sure that the resulting stylesheet is actually capable of > rendering at z19 convincingly. (The current XML one isn't.) > > Beyond that, it'll take some investigation into what extra hardware burden > z19 will impose. Perhaps you could help by running some tests into that? > > cheers > Richard > > > > > > -- > View this message in context: > http://gis.19327.n5.nabble.com/Mapnik-at-zoom-19-tp5744338p5746642.html > Sent from the General Discussion mailing list archive at Nabble.com. > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- John Novak 585-OLD-TOPOS (585-653-8676) http://www.linkedin.com/in/johnanovak/ OSM ID:oldtopos OSM Heat Map: http://yosmhm.neis-one.org/?oldtopos OSM Edit Stats:http://hdyc.neis-one.org/?oldtopos ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] overpass turbo - a web GUI for Overpass-API
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Nice tool, thanks. Though I have to admit that I am still using JOSM as I can filter the results after query and have a look at the other tags on these objects. Colliar -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) iEYEAREIAAYFAlEFLwUACgkQalWTFLzqsCu+awCeMt6Xqo+zHPPowiTqaRWR+IS0 qJwAoKInJP24eGz4dME8nxbNbVEV1VlI =iQ08 -END PGP SIGNATURE- ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
Gervase Markham wrote: >> Who do we need to talk to or where do we need to file a bug to get this >> request considered officially? > Anyone? If you want to make it happen, the best way to do this is to take part in the project to port the current stylesheet to Carto: https://github.com/gravitystorm/openstreetmap-carto and to make sure that the resulting stylesheet is actually capable of rendering at z19 convincingly. (The current XML one isn't.) Beyond that, it'll take some investigation into what extra hardware burden z19 will impose. Perhaps you could help by running some tests into that? cheers Richard -- View this message in context: http://gis.19327.n5.nabble.com/Mapnik-at-zoom-19-tp5744338p5746642.html Sent from the General Discussion mailing list archive at Nabble.com. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Mapnik at zoom=19
On 18/01/13 14:29, Gervase Markham wrote: > Who do we need to talk to or where do we need to file a bug to get this > request considered officially? Anyone? Gerv ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
