Thanks Jean-François, I'll try your solution. Is this clipping issue only a problem in the AGG renderer or does the original GD(?) renderer have the same problem.
Thanks Mike On Wed, Jan 26, 2011 at 11:00 AM, Jean-François Gigand <[email protected]> wrote: > Hi, > > I met the edge issue when I had to produce statistics maps with > proportional symbols. > > TileCache addressed the issue indeed, with the "metaBuffer" option > (see http://tilecache.org/docs/README.html#configuration). > It means that MapServer will be called to generate larger tiles which > are then cropped by TileCache, which has a time processing cost. > > The "metaTile" is meant to optimize this by rendering multiple tiles > as a single one. > > Jeff > > 2011/1/26 Gregor at HostGIS <[email protected]>: >>> I was using TileCache, but I switched it off to debug this problem. If >>> TileCache generates larger tiles, will there still be clipped labels? >>> Just fewer clipped labels? I don't think this is a workable solution >>> for me, but if I have the time I'll try it. >> >> Correct; there would be FEWER labels clipped (if you force them and allow >> partials) or missing (if you disallow partials). >> >> How many fewer, depends on how large you make your meta-tiles. If they're >> 5x5, that's a significant reduction in the number of tile edges. If you >> really turn up your MAXSIZE in your mapfile, you could potentially make >> 10x10 meta-tiles; that's 1% as many tile edges. >> >> You could also make your tiles larger. If you have 512x512 tiles, and 10x10 >> meta-tiles, that's a HUGE reduction in the number of tile edges over single >> 256x256 tiles. >> >> The only method I know that would eliminate ALL tile-edge artifacts, would >> be to eliminate tiling, e.g. singleTile:true in OpenLayers. Not that that's >> a great solution either, but it is sometimes the only way. >> >> -- >> HostGIS, Open Source solutions for the global GIS community >> Greg Allensworth - SysAdmin, Programmer, GIS Person, Security >> Network+ Server+ A+ Security+ Linux+ >> PHP PostgreSQL MySQL DHTML/JavaScript/AJAX >> >> "No one cares if you can back up — only if you can recover." >> _______________________________________________ >> 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
