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<p class="MsoNormal"><span style="color:#1F497D">I don’t believe this has ever been possible. If I understand you, the rendering order is:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:24.75pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Draw aerial photo<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:24.75pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Draw lake<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:24.75pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Draw islands (i.e. holes) in lake<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Step 2 has already mucked with pixels that you’re drawing (again) in step 3. You’d need to combine the lake and islands into multi-part polygons to get the affect you’re after.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> mapserver-users-bounces@lists.osgeo.org [mailto:mapserver-users-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Basques, Bob (CI-StPaul)<br>
<b>Sent:</b> Monday, December 02, 2013 11:14 AM<br>
<b>To:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-users] Transparent (OPACITY) color(S)<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">Last week I was trying to set a color to transparent in a mapfile, but it wasn’t working the way I expected.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">I have a polygon layer, on top of an Aerial Photo base, let’s call it a lake, with a single poly in it. I have another polygon layer with what we’ll call Islands, I want to color
fill the lake and apply the transparent color to the islands AFTER rendering to see through the filled lake poly to the underlying aerial layer. I tried all sorts of combinations of TRANSPARENT, OPACITY, OUTPUTFOMAT, etc. in the MAP and /or the LAYER elements
without success. I recall this used to be possible with older versions of MapServer. But now it seems that OUTPUTFORMAT has been brought into the equation for recent versions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">Hmm, maybe I’m trying to cheat things too much, or I need to read up on NEW Mapserver some more. :c)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">Anyone have an example of MAPFILE for accomplishing this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS"">Bobb<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS""><o:p> </o:p></span></p>
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