I have a solution to this, a client had exactly the same problem. Wanting to use tile mode, but not wanting caching, and wanting meta-tile flavored rendering results. Here is the ticket:
http://trac.osgeo.org/mapserver/ticket/3323 Note that basically you render and throw away a whole metatile for every tile you output -- the system is stateless. So it's best to keep the metatiles small (2x2). But if you have the horsepower to throw at it you can get real-time metatiled output. P. On Tue, Aug 24, 2010 at 6:59 AM, Rahkonen Jukka <jukka.rahko...@mmmtike.fi> wrote: > Hi Wim, > > If your data is that dynamic then there is not much advantage in using > tilecache. Perhaps there is not much advantage in making tiled requests > either. Applications asking for 256x256 pixel sized tiles from on-demand > bases are generating rather a lot of load for Mapserver. There is an > advantage on the user side because tiles are cached on the client side and > panning is fluent. However, the feeling is not necessarily bad even if the > client is making single tile WMS requests. With OpenLayers single tile > requests used together with "transition effect resize" is not bad at all. > Perhaps Google maps and Bing have some similar modes. Rendering and labeling > problems should go away by using single tiles. > > -Jukka Rahkonen- > > >> -----Alkuperäinen viesti----- >> Lähettäjä: mapserver-users-boun...@lists.osgeo.org >> [mailto:mapserver-users-boun...@lists.osgeo.org] Puolesta >> Stephen Woodbridge >> Lähetetty: 24. elokuuta 2010 16:43 >> Vastaanottaja: mapserver-users@lists.osgeo.org >> Aihe: Re: [mapserver-users] Mapserver tile generation - google maps >> >> Tilecache probably is not what you want if you have very >> dynamic tiles. >> Or at least a tile cache that is persistent. >> >> Your problem is with tile edge artifacts. It might be >> possible to draw >> on a slightly larger image than the tile, then cut the tile >> out of it to >> avoid some of those, but there are some tile artifacts that >> you can not >> get away from when you draw single tiles, like label positioning and >> label thinning over multiple tiles. >> >> For an alternative, you might look to mapscript where you could have >> more programmatic control over the rendering and do things >> like render a >> larger image than needed and cut out the tile like I mentioned. >> >> You might also write a bug against mode=tile and see what the >> developer >> response to that might be. >> >> -Steve W >> >> On 8/24/2010 8:04 AM, Wim Vanbelle wrote: >> > For reference sake: >> > >> > The issue is also present when using Bing maps as overlay. >> > I also recompiled mapserver against agg 2.5 and gd-2.0.36RC1, but no >> > change unfortunately. >> > >> > As stated in my previous mail, I may have to look for >> alternatives as >> > the tilecache will probably not be an option for us. >> > >> > Would it be possible to circumvent this problem by using WMS? >> > >> > >> > >> > >> > On 24 August 2010 07:25, Wim Vanbelle <wimvanbe...@gmail.com >> > <mailto:wimvanbe...@gmail.com>> wrote: >> > >> > Hi, >> > >> > Thank you for your time both. >> > >> > Wouldn't using tilecache imply that I can no longer use dynamic >> > data? My tiles have to update every minute. Perhaps >> this is possible >> > with tilecache? Basically it's only the color value >> that changes for >> > each object. >> > >> > An example request that is sent to mapserver: >> > >> > >> http://...maps?map=/.../white.map&layers=%20&mode=tile&tilemod > e=gmap&tile=264+172+9 >> > >> > MapServer version 5.6.5 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG >> > OUTPUT=WBMP OUTPUT=SWF OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG >> > SUPPORTS=FREETYPE SUPPORTS=ICONV SUPPORTS=FRIBIDI >> > SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER >> > SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER >> > SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS >> SUPPORTS=RGBA_PNG >> > INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE >> > >> > My mapfile is configured like this: >> > >> > OUTPUTFORMAT >> > NAME "AGGPNG" >> > DRIVER "AGG/PNG" >> > EXTENSION "png" >> > MIMETYPE "image/png;mode=24bit;" >> > IMAGEMODE RGBA >> > FORMATOPTION "INTERLACE=false" >> > FORMATOPTION "QUANTIZE_NEW=ON" >> > FORMATOPTION "QUANTIZE_FORCE=ON" >> > FORMATOPTION "QUANTIZE_DITHER=ON" >> > FORMATOPTION "QUANTIZE_COLORS=256" >> > END >> > >> > Although I've used GD as well. Not sure how I can >> check the GD & >> > AGG versions. >> > >> > I was in the process of making a new build for >> mapserver with the >> > lastest versions of everything though. I'll let you know if that >> > would somehow fix the problem. >> > >> > >> > >> > >> > >> > On 24 August 2010 06:45, Stephen Woodbridge >> <wood...@swoodbridge.com >> > <mailto:wood...@swoodbridge.com>> wrote: >> > >> > If you are using mode=tile, then this is a known >> limitation on >> > the mapserver side. There is a plan for 6.0 to add tilecache >> > support to mapserver that would allow you to >> generate meta tiles >> > and chop the tiles into a tilecache which is the >> way to resolve >> > the artifacts you are seeing. >> > >> > http://trac.osgeo.org/mapserver/ticket/3513 >> > >> > You can add yourself the CC on this bug if you want >> to follow >> > it. There is also an RFC for the mode=tile which I >> don't have >> > handy that should give you more information on the >> limitations >> > and feature of that. >> > >> > Hope this helps, >> > -Steve W >> > >> > >> > On 8/24/2010 12:34 AM, Lime, Steve D (DNR) wrote: >> > >> > What mapserver version, what graphics driver? >> Is this using >> > mode=tile? >> > >> > Steve ________________________________________ From: >> > mapserver-users-boun...@lists.osgeo.org >> > <mailto:mapserver-users-boun...@lists.osgeo.org> >> > [mapserver-users-boun...@lists.osgeo.org >> > >> <mailto:mapserver-users-boun...@lists.osgeo.org>] On Behalf >> > Of Wim Vanbelle >> > [wimvanbe...@gmail.com >> <mailto:wimvanbe...@gmail.com>] Sent: >> > Friday, August 20, 2010 6:26 AM To: >> > mapserver-users@lists.osgeo.org >> > <mailto:mapserver-users@lists.osgeo.org> Subject: >> > [mapserver-users] Mapserver >> > tile generation - google maps >> > >> > Hi all, >> > >> > I noticed a similar post regarding symbol >> issues, but there >> > was no >> > solution. My Google maps tiles are currently >> clipped at the tile >> > itself. This results in rather unwanted behaviour: >> > >> > http://fileshare.myroute.be/exchange/Capture.PNG >> > >> > I'm not 100% sure that this is mapservers' 'issue' , or >> > google maps >> > issue. >> > >> > If anyone would have further tips to spice up >> the graphics >> > even more, >> > I'd be more than glad to hear them :). >> > >> > Thanks. Wim >> _______________________________________________ >> > mapserver-users mailing list >> mapserver-users@lists.osgeo.org >> > <mailto:mapserver-users@lists.osgeo.org> >> > >> > http://lists.osgeo.org/mailman/listinfo/mapserver-users >> > >> > >> > >> > >> > >> > >> > _______________________________________________ >> > mapserver-users mailing list >> > mapserver-users@lists.osgeo.org >> > http://lists.osgeo.org/mailman/listinfo/mapserver-users >> >> _______________________________________________ >> mapserver-users mailing list >> mapserver-users@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/mapserver-users >> > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
