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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You can compute a color string using PostgreSQL string functions:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> SELECT percentage || ‘ 0 0’ AS color FROM …<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<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>Do Wi<br>
<b>Sent:</b> Sunday, June 22, 2014 3:50 PM<br>
<b>To:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-users] color attribute question<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">hi!</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">i have this scenario:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">i have a column in my postgis table which contains a double representing a percentage.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">i want to color my polygons in a gradient fashion based on that number.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">the docs states three ways to specify color:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">1. three [1-255] numbers<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">2. hex string<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">3. [attribute]<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">but the attribute must be a string by itself in the same format as options 1 or 2.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">how can i achieve something like <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">COLOR [percentage]*255 0 0<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">or<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">COLOR [percentage] 0 0<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">if percentageis already 0..255<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">for a red gradient for example? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Arial","sans-serif"">thanks allot!<o:p></o:p></span></p>
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