[mapserver-users] differing image size with different mapserver versions

Richard Greenwood richard.greenwood at gmail.com
Sat May 15 08:43:03 PDT 2021


I get significantly different image sizes between MapServer 6.4 and 7.6
with the same output format definition. I've tried many variations of the
following.

OUTPUTFORMAT
  NAME "png-test"
  DRIVER "AGG/PNG"  # GD driver is same (6.4 only)
  MIMETYPE "image/png; mode=8bit"
  IMAGEMODE PC256
  FORMATOPTION "QUANTIZE_FORCE=on"
  FORMATOPTION "QUANTIZE_COLORS=256"
  EXTENSION "png"
  # TRANSPARENT on or off makes little difference
END

MapServer 6.4 <https://greenwoodmap.com/mapserv64.png> is 90kB, MapServer
7.6 <https://greenwoodmap.com/mapserv76.png> is 320kB. Any suggestions as
to how I can get my MapServer 7.6 image sizes down closer to what I'm
getting in MapServer 6.4?

Thanks,
Rich

-- 
Richard W. Greenwood, PLS
www.greenwoodmap.com
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