I am indeed using tile indices. I didn't think there would be any problem with that step, but just to be sure I went ahead and checked. They all looked ok, but I noticed that all the features that use tile indexes were the exact features that aren't showing up- small roadways, highway shields, etc. This was highly suspicious, and so I did a lot of digging.
I recreated all the index shape files, this time using an old version of the tile4ms and shptree utilities that I had fortunately saved when I generated the map in 2011, and found that tileindex shapefiles were no much larger, and the map was rendered correctly! So, all I can say for sure is that the current version of tile4ms and shptree definitely did not work. This issue has been reported at least twice before it seems, http://trac.osgeo.org/mapserver/ticket/4259 http://www.mail-archive.com/[email protected]/msg17207.html And I guess it is worth noting that this problem is still present in the latest version (MapServer version 6.2.1 OUTPUT=PNG OUTPUT=JPEG SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=ICONV INPUT=JPEG INPUT=SHAPEFILE). Thanks so so much for your help! Let me know if you need further info. Joseph ----- Original Message ----- From: "thomas bonfort" <[email protected]> To: "Joseph Marlin" <[email protected]> Cc: "MapserverList OSGEO" <[email protected]> Sent: Saturday, August 10, 2013 3:18:03 AM Subject: Re: [mapserver-users] The Case of the Disappearing Roads Another thing to check: are you using a tileindex to reference your shapefiles, and if so, is the tileindex up-to-date (i.e. does it reference all your shapefiles). -- thomas On 9 August 2013 20:04, Joseph Marlin <[email protected]> wrote: > Thanks Thomas for the idea. I think I understand what you're asking. We > pre-render all our tiles though, so while the screenshots are indeed showing > a javascript viewer, that viewer is simply loading the prerendered images, > retrieved from tilecache. And I have made sure that it isn't TileCache > storing old tiles. > > ----- Original Message ----- > From: "thomas bonfort" <[email protected]> > To: "Joseph Marlin" <[email protected]> > Cc: "MapserverList OSGEO" <[email protected]> > Sent: Friday, August 9, 2013 1:54:41 PM > Subject: Re: [mapserver-users] The Case of the Disappearing Roads > > Joseph, > are the images you are posting a direct result of a getmap request > (i.e. with width=1007&height=454), or are they a screenshot of a > javascript client that is doing tiled requests to mapserver? > If those are tiled requests, are your layer/class minscale/maxscale > settings set to the exact values of your requested resolutions (i.e. > their might be some rounding errors in that case that make a > scale-dependant class appear or disappear based on floating point > rounding errors). > > -- > thomas > > On 9 August 2013 19:03, Joseph Marlin <[email protected]> wrote: >> The Case of the Disappearing Roads >> >> We create shapefiles with SQL querying world data that's been loaded into a >> PostgreSQL database. A python script requests tiles from mapserver at >> different zoom levels, and we generate the entire map like that. >> >> Now, at the sixth zoom level, level 3 roads (medium size roads) should be >> rendered. However, they are actually rendered only in a small section of the >> world, a box bounded by Toronto in the northwest, Cleveland in the >> southwest, and the Atlantic in the east. Elsewhere, level 3 roads are not >> rendered at all. >> >> As you can see in this image: http://i.imgur.com/6McvGOJ.png, the small gray >> roads, level 3 roads, (and highway shields, for that matter) that are >> visible on the top half suddenly stop being rendered by mapserver. >> >> In all the following more zoomed in levels, no roadways smaller than level 2 >> are rendered at all anywhere, as you can see here: >> http://i.imgur.com/8MTcPoi.png. I've verified that the shapefiles contain >> the data on the smaller roads as I have viewed them just fine with QGIS, as >> you can see here: http://i.imgur.com/S3W3Iy8.png >> >> I'm so confused as to what could possibly make roads disappear midway >> through a level. If it was a problem with my mapfile, why would they show up >> in part of Northeast US, but not anywhere else? Where do I even start >> looking to solve this? >> >> Thanks so much! >> >> Additional info: >> SRS: EPSG:900913 >> Zoom levels: 19567.8792375, 9783.93961875, 4891.969809375, 2445.9849046875, >> 1222.99245234375, 611.496226171875, 305.7481130859375, 152.87405654296876, >> 76.43702827148438, 38.21851413574219, 19.109257067871095, 9.554628533935547, >> 4.777314266967774, 2.388657133483887, 1.1943285667419434, >> 0.5971642833709717, 0.29858214168548586 >> Bounding box: -20037508.3427892,-20037508.3427892, >> 20037508.3427892,20037508.3427892 >> _______________________________________________ >> mapserver-users mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
