For what it's worth: https://github.com/mapserver/mapserver/issues/4512
Rich On Tue, Oct 23, 2012 at 7:30 PM, Stephen Woodbridge <[email protected]> wrote: > On 10/23/2012 4:31 PM, Richard Greenwood wrote: >> >> All - >> >> I've have always used 8 bit GIFs because they are generally the >> smallest. I serve a rural area with flaky internet and I do a good bit >> with mobile, so size is more important to me than pixel-perfect. >> Since MapServer 6.0 I have found 8 bit output (GIF or PNG) to be much >> more buggy than 24 bit output. Bugs that I have been able to isolate >> and report have been fixed very quickly by the devs, but I'm >> struggling with a couple now that are sporadic and that I can not >> shrink down to a reproducible bug report. I see the same issues in >> Windows and Linux. I'm running 6.0.3 on both. So: >> 1. What image format are people generally using? Am I stuck in the >> past with 8 bit images? Should I just go with 24 bit and not worry >> that my images are several times larger? >> 2. My general sense is that the root of the issues I'm seeing are in >> the shift from GD to AGG. Are PC256 PNGs generated by GD or AGG? >> 3. Any general advise for 8 bit output? For GIF is use the default (I >> don't define an OUTPUTFORMAT block) for PNG I do define an >> OUTPUTFORMAT block and use IMAGEMODE PC256. >> >> The two issues that I'm struggling with right now are that my label >> colors change as I pan and zoom, and that the HATCH fill pattern >> extends outside of its polygons. In both cases switching from an 8 bit >> output to a 24 bit output resolves the issue. >> >> Thanks, >> Rich >> > > Rich, > > I use this: > > OUTPUTFORMAT > NAME "agg_qn" > DRIVER "AGG/PNG" > EXTENSION "png" > MIMETYPE "image/png" > IMAGEMODE RGB > FORMATOPTION "INTERLACE=false" > FORMATOPTION "QUANTIZE_NEW=ON" > FORMATOPTION "QUANTIZE_FORCE=ON" > FORMATOPTION "QUANTIZE_DITHER=OFF" > FORMATOPTION "QUANTIZE_COLORS=256" > #TRANSPARENT ON > #FORMATOPTION "TRANSPARENT=ON" > END > > It gives me 8-bit png and I have no problem with it. Here is an example > using mapserver and mapcache > > http://imaptools.com:8080/demo/tiger-tiles.html > > And here is an example using just mapserver and draw on demand: > > http://imaptools.com:8080/demo/tiger2011.html > > I think both of these are using: > > MapServer version 6.0.2 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG SUPPORTS=PROJ > SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=ICONV SUPPORTS=FRIBIDI > SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=GEOS > INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE > > Hope this helps, > -Steve W > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users -- Richard Greenwood [email protected] www.greenwoodmap.com _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
