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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009>Hi,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009>Not so that everybody gets answered, sometimes nobody
just knows the answer, and after all, this is voluntary. But still, I can
see from the archives that Thomas Bonfort had a try on the same day and
only one and a half hours delayed :)</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009>-Jukka Rahkonen-</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=349534608-14052009></SPAN></FONT> </DIV>
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<DIV dir=ltr align=left><FONT face=Tahoma size=2><B>Lähettäjä:</B>
mapserver-users-bounces@lists.osgeo.org
[mailto:mapserver-users-bounces@lists.osgeo.org] <B>Puolesta </B>David
Nugent<BR><B>Lähetetty:</B> 14. toukokuuta 2009 8:01<BR><B>Vastaanottaja:</B>
David Nugent<BR><B>Kopio:</B> mapserver-users@lists.osgeo.org<BR><B>Aihe:</B>
Re: [mapserver-users] Mapserver rendering with 24 bit
colour<BR></FONT><BR></DIV>
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<DIV>On 06/05/2009, at 1:52 PM, David Nugent wrote:</DIV><BR
class=Apple-interchange-newline>
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<DIV><SPAN class=Apple-style-span style="COLOR: rgb(0,0,0)">Once I completed
upgrading to mapserver 5.4, I decided I'd give the new AGG renderer a
try.</SPAN></DIV>
<DIV>~</DIV>
<DIV><SPAN class=Apple-style-span style="COLOR: rgb(0,0,0)">However, as a
by-product of changing renderer, the metatiles produced by mapserver differ
slightly in colour. Some agree exactly to the RBG colours I am providing,
others are rendered with slight variations, and when viewed on the web it
becomes fairly obvious where the meta tile borders
are.</SPAN></DIV></DIV></BLOCKQUOTE></DIV>
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<DIV>This is to follow up on my own question to which I received no response
either on the list or otherwise in case anyone else runs into the same or a
similar problem.</DIV>
<DIV><BR></DIV>
<DIV>I finally found the problem in that the php mapscript had a bug, and that
"AGG_Q" (AGG with quantize enabled) was being selected regardless that I was
trying to tell it to do it differently. Once I correctly set it to AGG without
quantize, the colour variation between tiles disappeared and all is
well.</DIV>
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<DIV>One interesting aspect of this is that the average file size did not
increase significantly when dropping quantize although in general the tiles
rendered using AGG are around 40-50% larger than PNG8.</DIV>
<DIV><BR></DIV>Regards,<BR>
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<DIV>--</DIV>
<DIV>David Nugent (<A
href="mailto:davidn@datalinktech.com.au">davidn@datalinktech.com.au</A>)</DIV>
<DIV>Software Engineer</DIV>
<DIV>datalink technologies pty ltd</DIV>
<DIV>Mobile GPS/GPRS business process solutions</DIV>
<DIV><A
href="http://www.datalinktech.com.au/">http://www.datalinktech.com.au/</A></DIV>
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