Hello! First, excuse my (very) bad English ... I’m here to gather some help about map rendering :p I'm currently trying to make a local tile server with Graphhopper ( router ), and Leaflet.JS ( for interactive maps ). I download the OSM file for the Alsace country ( in France ). Imported the OSM to a PostGre Database with osm2pgsql, then rendering tiles with mapnik ( zoomlevel 0 to 16 ). Everything worked fines, but ... Mapnik doesn't seems to render all tiles, some parts, but not all. Here is a sample capture to demonstrate : http://i.imgur.com/wD8q4wM.png ( the grey part are the missing tiles ) We can easily find what tiles/coordinates are missing with HTTP sniffing ( for example with the Firefox Dev tools ). Should I generate tiles with Mapnik and OSM file directly ? Thank you in advance! :) asked 19 Nov '14, 02:46  FoxyAntho |
One Answer:
My first idea is a time-out from your tile server, not a problem in mapnik itself. The time to render a tile varies a lot. We should analyze your config and the logs of the software calling mapnik to see why some tiles are absent (renderd ?). I know there is a timeout configurable and you can also set the quadtile size. This all depends on your machine perfs. answered 19 Nov '14, 09:27  Pieren |
Thanks for your reply :)
I'm not using Renderd but Manpnik to generate tiles files.
Why I know they are a missing : I look-up at Apache logs --> 404 ( not found error ).
mapnik is generating tiles but apache is not calling mapnik directly. You need a plugin in apache that is checking if tiles have to be (re)rendered and sends a render request to a "mapnik rendering job manager", either done by tirex or renderd deamons. These deamons can drop a render request if it takes too long to serve the tile to the web client. But timeout is configurable. Again, contact the dev or dev-fr mailing lists to get more info. This help site is more for newcomers, not devs.