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<p class="MsoNormal">This seems to be a common problem, yet I find it difficult to get a solution by searching list archives and so forth and hacking at it (4 hours now).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have slope rasters for a large area – they are slightly overlapping 32-bit float GeoTIFFs. The images have a 1-pixel border with the value -9999. Otherwise slope is shown as percent and ranges from 0 to just over 7000%.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I just want to turn off the ‘nodata’ pixels – those with values -9999 and keep my LUT values as shown below. I am accessing this a WMS. MapServer 6.2 (MS4W 3.0.4).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PROCESSING “NODATA=-9999”<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">and<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PROCESSING “SCALE=0,7000”<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">and<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PROCESSING “LUT=-9999:0,0:10,50:200,100:225,7000:255”<o:p></o:p></p>
<p class="MsoNormal">OFFSITE 0 0 0<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And various combinations, etc. I also tried setting pixel queries using STYLE blocks but that seemed really clunky and I couldn’t see how to get what I want.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In the first two cases, it seems like the directives are just ignored. In the last case I get an error message when I use a negative value in my LUT.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Trying to avoid reprocessing all the tiles…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for any help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D">===============================<br>
<b>Michael Smith MS GISP</b><br>
State GIS Manager, Maine Office of GIS<br>
State of Maine, Office of Information Technology<br>
<i>michael.smith _at_ maine.gov</i> 207-215-5530<br>
<br>
Board Member, Maine GeoLibrary<br>
Education Chair, Maine GIS Users Group<br>
State Rep, National States Geographic Information Council</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><img width="299" height="68" id="_x0000_i1025" src="cid:image001.jpg@01CE345E.8DAC1BC0"></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
<br>
</span><span style="font-size:8.0pt;color:#1F497D">State House Station 145<br>
51 Commerce Drive<br>
Augusta, ME 04333-0145<br>
69<sup>o</sup> 47' 58.9"W 44<sup>o</sup> 21' 54.8"N</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">
</span><o:p></o:p></p>
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