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<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">Hi,</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">It would help if you could send:</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">- The WMS GetMap request you are using to reach the WMS server number one (the one with refs.map)</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">- The image you are getting with bad aliasing</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">- Corresponding GetMap request that the first WMS is making for the second WMS with roads.map. You will find it from the access.log file</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">- Image captured with the above GetMap from the second WMS.</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012">-Jukka Rahkonen-</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="394303714-26012012"></span></font> </div>
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<font size="2" face="Tahoma"><b>Lähettäjä:</b> mapserver-users-bounces@lists.osgeo.org [mailto:mapserver-users-bounces@lists.osgeo.org]
<b>Puolesta </b>SAEZ Laurent - SG/SPSSI/CPII/DOM/ETER/PNE IG<br>
<b>Lähetetty:</b> 26. tammikuuta 2012 15:18<br>
<b>Vastaanottaja:</b> mapserver-users@lists.osgeo.org<br>
<b>Aihe:</b> [mapserver-users] MapServer seems to always use GDAL driver with cascaded WMS (instead of AGG)<br>
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<p>Hi, </p>
<p>I have some troubles using AGG with cascaded WMS. </p>
<p>I have my first mapfile that exposes WMS layers (<a class="wiki" href="http://trac.osgeo.org/mapserver/wiki/MapServer">MapServer</a> is used as a WMS server and a WMS client): refs.map<br>
I have a second mapfile that contains a Postgis layer (this mapfile uses only <a class="wiki" href="http://trac.osgeo.org/mapserver/wiki/MapServer">
MapServer</a> as WMS server): roads.map<br>
I'm using <a class="wiki" href="http://trac.osgeo.org/mapserver/wiki/MapServer">MapServer</a> 5.6.0 beta 3 on Debian (to avoid WFS requests issues with the following versions cf.
<a class="moz-txt-link-freetext" href="http://trac.osgeo.org/mapserver/ticket/4073">
http://trac.osgeo.org/mapserver/ticket/4073</a>).<br>
I advertise raster formats with "wms_getmap_formatlist". I define image/png to use AGG driver.<br>
I can get nice PNG with AGG when I request directly my second mapfile roads.map (using mapserver only as WMS server).<br>
But if I request my first mapfile refs.map (that requests my second mapfile using
<a class="wiki" href="http://trac.osgeo.org/mapserver/wiki/MapServer">MapServer</a> as WMS client. This is the WMS cascade), I get PNG with bad aliasing (AGG does not seem to be used!).<br>
I looked at the mapserv.log (for the WMS/GetMap that requests the cascaded WMS) and I saw : "msDrawGDAL(): red,green,blue,alpha bands = 1,2,3,4"<br>
Does "msDrawGDAL" meen that DGAL driver is used instead of AGG driver ?<br>
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<p>Thanks for your reply.<br>
Laurent<br>
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<p><br>
An extract of my first mapfile (refs.map): "MAP ... </p>
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<p>OUTPUTFORMAT<br>
NAME "PNG"<br>
DRIVER "AGG/PNG"<br>
MIMETYPE "image/png"<br>
IMAGEMODE RGBA<br>
TRANSPARENT ON<br>
END<br>
... <br>
WEB<br>
...<br>
METADATA<br>
...<br>
"wms_getmap_formatlist" "image/png,image/jpg,image/jpeg"<br>
END<br>
END<br>
LAYER<br>
NAME "my_layer" ... CONNECTIONTYPE WMS "<a class="ext-link" href="http://my_domain/cgi-bin/mapserv?map=/my_path/roads.map"><span class="icon"> </span>http://my_domain/cgi-bin/mapserv?map=/my_path/roads.map</a>"<br>
...<br>
METADATA<br>
"wms_name" "my_roads"<br>
"wms_server_version" "1.1.1"<br>
"wms_format" "image/png"<br>
...<br>
END<br>
END ... </p>
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<p>An extract of my second mapfile (roads.map) : MAP ... </p>
<blockquote>OUTPUTFORMAT<br>
NAME "PNG"<br>
DRIVER "AGG/PNG"<br>
MIMETYPE "image/png"<br>
IMAGEMODE RGBA<br>
TRANSPARENT ON<br>
END... <br>
WEB<br>
METADATA<br>
...<br>
"wms_getmap_formatlist" "image/png,image/jpg,image/jpeg"<br>
END<br>
END<br>
LAYER<br>
NAME "my_roads" ... CONNECTIONTYPE postgis<br>
...<br>
END<br>
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<p>I'm not sure that this behavior should be different with mapserver 6.0... </p>
<p>NB: I've already post this message on Tue, 27 Apr 2010 in the mailing list, but no reply... ;-(
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