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I have a data set of palette imagery. These are basically RGB imagery that have been converted to 1 band color map imagery using ArcGIS.

I am loading the images to GeoServer as GeoTIFFs but nothing is being displayed in OpenLayers, it is just blank white page. I was wondering if this has to do with their style file, or am I missing something else?

  • How are you attempting to view the images with OpenLayers? I mean are you trying to view a TIFF in a browser? or do you have a WMS using the GeoTIFF as a datasource. What request is sent to GeoServer from your OpenLayers client? – nmtoken Apr 18 '18 at 17:52
  • In GeoServer's "Layer Preview" there is an option of OpenLayes.. That's what I was referring to. And When I cache a Tiff file using GeoWebCache and create a WMTS, the result is still white and blank. – JackB Apr 18 '18 at 18:01
  • You should edit your question to add those details. There is still a request being sent to the GeoServer server, which you can capture. I'm still not clear from your response whether you are requesting a TIFF or not. TIFFs generally don't display in a browser, doesn't matter what the palette is. – nmtoken Apr 18 '18 at 18:51
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    how did you add the tiff to geoserver, what style did you apply? Does the coverage band info on the layer page show that it is palletted? – Ian Turton Apr 19 '18 at 8:27
  • Try to change WMS style. From Layers--> Publishing Tab--> WMS style. – Oscar Campo Apr 22 '18 at 8:14
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It's hard to answer this without access to your data file, but when I add a palleted geotif to GeoServer I see the following on the layer page under coverage parameters:

enter image description here

I use a simple style to just set a minimum and maximum scale to display at and everything works just fine:

<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/sld
http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd" version="1.0.0">
  <NamedLayer>
    <Name>ras250</Name>
    <UserStyle>
      <Title>A raster style</Title>
      <FeatureTypeStyle>
        <Rule>
          <MinScaleDenominator>15001</MinScaleDenominator>
          <MaxScaleDenominator>300000</MaxScaleDenominator>
          <RasterSymbolizer>
            <Opacity>1.0</Opacity>
          </RasterSymbolizer>
        </Rule>
      </FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>

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