<div class="gmail_quote">Here's another way you can do it, a Python script that will create discreet color classes from a grayscale image. It uses a function named MakeColor which is currently set to work on Z values between 0 and 255. You can test it by converting your file into an 8-bit version (gdal_translate -scale -ot Byte <infile> <outfile> ), and then running the tool on it. Once you see how it works, it should be pretty simple to modify the function to deal with the actual ranges in your data.<br>
<br>Roger<br>--<br><br>On Thu, Apr 9, 2009 at 4:24 PM, alvarez00 <span dir="ltr"><<a href="mailto:oalvarez00@gmail.com">oalvarez00@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
I'm trying to make a color ramp for a 1-band tiff file or a jpeg. I have a 1-band tiff file and I converted that tiff file into VRT. I was reading some of the posts and some suggest to modify the VRT file and add a ColorTable tag but that doesn't work. My objective is to show the tiff(or)jpeg on google earth. I'm running version 1.4.1.0 of gdal. Below is the VRT file without any modifications. What I modify was the '<ColorInterp>Gray</ColorInterp>' to '<ColorInterp>Palette</ColorInterp>' and added a ColorTable.<br>
<br>
VRTDataset rasterXSize="1200" rasterYSize="1096"><br>
<SRS>GEOGCS[&quot;NAD83&quot;,DATUM[&quot;North_American_Datum_1983&quot;,SPHEROID[&quot;GRS 1980&quot;,6378137,298.2572221010002,AUTHORITY[&quot;EPSG&quot;,&quot;7019&quot;]],AUTHORITY[&quot;EPSG&quot;,&quot;6269&quot;]],PRIMEM[&quot;Greenwich&quot;,0],UNIT[&quot;degree&quot;,0.0174532925199433],AUTHORITY[&quot;EPSG&quot;,&quot;4269&quot;]]</SRS><br>
<GeoTransform> -1.2459079918952935e+02, 8.9964705882352915e-03, 0.0000000000000000e+00, 4.2216820949146452e+01, 0.0000000000000000e+00, -8.9964705882352915e-03</GeoTransform><br>
<Metadata><br>
<MDI key="AREA_OR_POINT">Area</MDI><br>
</Metadata><br>
<VRTRasterBand dataType="Float32" band="1"><br>
<Metadata/><br>
<NoDataValue>-3.40282346638529E+38</NoDataValue><br>
<ColorInterp>Gray</ColorInterp><br>
<SimpleSource><br>
<SourceFilename relativeToVRT="1">GoesWest1V1561915.tif</SourceFilename><br>
<SourceBand>1</SourceBand><br>
<SrcRect xOff="0" yOff="0" xSize="1200" ySize="1096"/><br>
<DstRect xOff="0" yOff="0" xSize="1200" ySize="1096"/><br>
</SimpleSource><br>
</VRTRasterBand><br>
</VRTDataset><br>
<font color="#888888"><br>
--<br>
View this message in context: <a href="http://n2.nabble.com/1-band-TIFF-FILE-color-ramp-NEEDED-tp2613963p2613963.html" target="_blank">http://n2.nabble.com/1-band-TIFF-FILE-color-ramp-NEEDED-tp2613963p2613963.html</a><br>
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</font></blockquote></div><br>