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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Here is a long thread about turning off antialias
<a href="http://osgeo-org.1560.x6.nabble.com/Draw-roads-WITHOUT-anti-aliasing-td5338614.html">
http://osgeo-org.1560.x6.nabble.com/Draw-roads-WITHOUT-anti-aliasing-td5338614.html</a>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">I had the same wrong idea about gamma=0 back then but perhaps gamma=0.01 could work.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>Lähettäjä:</b> mapserver-users <mapserver-users-bounces@lists.osgeo.org>
<b>Puolesta </b>Rahkonen Jukka (MML)<br>
<b>Lähetetty:</b> maanantai 17. toukokuuta 2021 16.06<br>
<b>Vastaanottaja:</b> Mapserver-Users (mapserver-users@lists.osgeo.org) <mapserver-users@lists.osgeo.org><br>
<b>Aihe:</b> Re: [mapserver-users] differing image size with different mapserver versions<o:p></o:p></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">(Re-sent as edited to mailing list because the body was originally too long.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Are you sure about “</span><span lang="EN-US">I actually found that 6.4 produced small, aliased images with both the GD and AGG drivers”. Or</span><span lang="EN-US" style="mso-fareast-language:EN-US">iginally
the AGG library could only do anti-aliasing and that affected also Mapserver 5 <a href="https://lists.osgeo.org/pipermail/mapserver-users/2007-September/025467.html">
https://lists.osgeo.org/pipermail/mapserver-users/2007-September/025467.html</a>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">I guess that Mapnik folks have since that added support for controlling anti-aliasing with gamma setting
<a href="http://mapnik.org/mapnik-reference/">http://mapnik.org/mapnik-reference/</a>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">I can see that gamma can be used also with Mapserver
<a href="https://www.mapserver.org/mapfile/outputformat.html">https://www.mapserver.org/mapfile/outputformat.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Have a try with gamma=0. However, Even wrote that turning off antialiasing is possible only in master, so perhaps gamma=0 does not work.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">The documentation for Mapserver 5 tells that “</span><span lang="EN-US">All ANTIALIAS keywords are now ignored". But the keyword still appears in quite a many places:</span><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><a href="https://mapserver.org/search.html?q=antialias">https://mapserver.org/search.html?q=antialias</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Would it be time to remove them as well as now not useful references to GD renderer (removed by RFC 99 in 2013)?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">Lähettäjä:</span></b><span lang="EN-US"> mapserver-users <<a href="mailto:mapserver-users-bounces@lists.osgeo.org">mapserver-users-bounces@lists.osgeo.org</a>>
<b>Puolesta </b>Richard Greenwood<br>
<b>Lähetetty:</b> maanantai 17. toukokuuta 2021 15.26<br>
<b>Kopio:</b> <a href="mailto:mapserver-users@lists.osgeo.org">mapserver-users@lists.osgeo.org</a><br>
<b>Aihe:</b> Re: [mapserver-users] differing image size with different mapserver versions<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">Thanks for the suggestions. The consensus seems to be that anti-aliasing is causing the increased size. The
<a href="https://mapserver.org/output/antialias.html">documentation here</a> says "<i>Since version 6.0, MapServer will produce aliased output for the “gd/” drivers, and antialiased output for the “agg/” and “cairo/” ones</i>" and it's also mentioned
<a href="https://lists.osgeo.org/pipermail/mapserver-users/2012-April/072011.html">
here</a> in Thomas Bonfort's reply. I actually found that 6.4 produced small, aliased images with both the GD and AGG drivers and regardless of my ANTIALIAS true/false setting. <o:p></o:p></p>
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<p class="MsoNormal">Would anyone consider re-enabling the ANTIALIAS true/false option?<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Rich<o:p></o:p></p>
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