Re: [OSM-talk] Creating custom OSM sites using the Mapnik OSM plugin?
Do people think this is a good idea? It's one of several possibilities that I'd like to work on, though I'd probably only do so if there's sufficient interest and/or I can't resolve the memory issues on my own site in other ways. Sorry to follow up my own post - but I forgot to say, this would be aimed more at small scale, specialist sites (e.g. a city, a county or a small country such as England or Wales) rather than say, Europe-, USA-, or world-wide, as it would be required to upload locally-generated tiles onto a server which probably wouldn't be feasible large scale. Nick ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Creating custom OSM sites using the Mapnik OSM plugin?
Hi Nick! On Lun 22 Feb 2010, Nick Whitelegg wrote: Do people think this is a good idea? It's one of several possibilities that I'd like to work on, though I'd probably only do so if there's sufficient interest and/or I can't resolve the memory issues on my own site in other ways. well, to handle amounts data as large as planet.osm in a performant manner, I think you need efficient database-like infrastructure (fast search trees, cache mechanisms and such). I wrote a potential zero-install script to use SQLite for OSM data, which performance already is rather low, but for let's say 100 MByte osm file that would be feasable. But would this be sane? I don't think so, because like this you use CPU resources like a Hummer SUV uses gas (until the tile cache is filled). On the other hand, you can compile PostgreSQL in a local way, in your local user account. It is actually surprising, that it is just a tiny ~ 5 MByte install, nearly as easy to handle as SQLite. Perhaps this would be a solution, à la WAMP packages which contain software stacks like Apache, MySQL, PHP in an easy to use installer. Are there other efficient binary representations of OSM data? It seems there are, gosmore contains its own OSM data converter, (http://wiki.openstreetmap.org/wiki/Gosmore) is fast and uses just osm.bz2 * 2 file space. Cheers, Jochen ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Creating custom OSM sites using the Mapnik OSM plugin?
Hi again, Sorry for misinterpreting your mail. Now I understand, that you suggest uploading tiles to a server due to (memory) restrictions. If PostGIS is not what you like, what about MySQL (perhaps without geo extensions, if they depend on libraries not available on a common hosting server environment)? Jochen ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Creating custom OSM sites using the Mapnik OSM plugin?
Hi Nick, I would be very interested in such an application, especially for generating custom tiles from an OSM file for use on mobile devices. Cheers, Joseph On 22 February 2010 12:43, Nick Whitelegg nick.whitel...@solent.ac.uk wrote: Not sure if talk's the best place for this, rather than dev, but I would guess so as it doesn't relate to OSM development itself. Anyway, some time ago I developed the OSM plugin for Mapnik, but due to other things haven't worked on it for a while. However I always thought that it would be useful in allowing people to generate OSM tiles on their own machine without the need for a PostGIS database. This has a number of benefits: firstly, someone who wanted to create their own OSM-based site wouldn't need to set up PostGIS, which can be a little tricky, and secondly (and I'm finding this is becoming quite a severe problem on my own Freemap site) the server resources required would be much less - the server could just serve static Mapnik tiles with no need for a database at all (though my own site still needs a database for the POIs). Users could render on their own machine and then upload. After the initial phase a GUI could be added to the application. Do people think this is a good idea? It's one of several possibilities that I'd like to work on, though I'd probably only do so if there's sufficient interest and/or I can't resolve the memory issues on my own site in other ways. Nick ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Creating custom OSM sites using the Mapnik OSM plugin?
Nick, the main problem with the OSM plugin is that the user group most likely to be unable or unwilling to install PostGIS is also the group least likely to develop their own map style, and the plugin doesn't come with something even remotely resembling what these people usually expect, namely the openstreetmap.org style. Regarding tile generation and uploading; I don't think this is something that can ever compete with a proper Mapnik setup. If I really were very limited regarding the tile server, say if that were a VM where I can do nothing but deliver pre-made tiles, I would still install a plain vanilla Mapnik/PostGIS setup on my home machine and run tilesgen there, uploading the results. I haven't run the OSM plugin myself but I should be very surprised if, using a style that has about the same level of detail the osm.org style has, you could render an English county on an useful zoomlevel faster with that setup than, on the same machine, with a PostGIS+osm2pgsql+Mapnik setup. I regularly use the data for Baden-Wuerttemberg in Germany as a test bed and this takes only a few minutes to import with osm2pgsql on a normal desktop PC... Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09 E008°23'33 ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Creating custom OSM sites using the Mapnik OSM plugin?
On Mon, Feb 22, 2010 at 13:43, Nick Whitelegg nick.whitel...@solent.ac.uk wrote: Do people think this is a good idea? It's one of several possibilities that I'd like to work on, though I'd probably only do so if there's sufficient interest and/or I can't resolve the memory issues on my own site in other ways. I do! this will remove one layer of difficulties from the user wanting to render their own city/province. And i think that a one shot rendering, then uploading to the server would be something that will broaden the use of custom maps. Thus encourage people in experimenting with mapnik styles. Maybe leading to the creation of a style editor. I'll be one of your beta testers, if you need one! -- -S ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
