I am trying to compute raster zonal statistics using a TIFF and a Shapefile. I am using WPS process extension for GeoServer. I am trying to use the WPS request builder provided by my GeoServer installation under demos.

I am trying to execute the process to see the output but I am getting the message in the second screenshot. My geoTiff file is 459 MB. Am I doing something wrong?

The following are the screenshots:

enter image description here.

enter image description here

The following is the xml output generated by clicking the "Generate xml from process I/O":

<?xml version="1.0" encoding="UTF-8"?><wps:Execute version="1.0.0" service="WPS" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.opengis.net/wps/1.0.0" xmlns:wfs="http://www.opengis.net/wfs" xmlns:wps="http://www.opengis.net/wps/1.0.0" xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:gml="http://www.opengis.net/gml" xmlns:ogc="http://www.opengis.net/ogc" xmlns:wcs="http://www.opengis.net/wcs/1.1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd">
      <wps:Reference mimeType="image/tiff" xlink:href="http://geoserver/wcs" method="POST">
          <wcs:GetCoverage service="WCS" version="1.1.1">
              <ows:BoundingBox crs="http://www.opengis.net/gml/srs/epsg.xml#4326">
                <ows:LowerCorner>-128.14691380352517 22.714877523496572</ows:LowerCorner>
                <ows:UpperCorner>-65.08558771879018 51.75931655065378</ows:UpperCorner>
            <wcs:Output format="image/tiff"/>
      <wps:Reference mimeType="text/xml" xlink:href="http://geoserver/wfs" method="POST">
          <wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2" xmlns:soil_system="soil_system">
            <wfs:Query typeName="soil_system:USA_States_WGS84"/>
      <wps:Reference mimeType="image/tiff" xlink:href="http://geoserver/wcs" method="POST">
    <wps:RawDataOutput mimeType="text/xml; subtype=wfs-collection/1.0">
  • please ask for the XML and then add that to the question
    – Ian Turton
    Commented Aug 31, 2017 at 8:06
  • @iant I just did. Thanks for taking a look at it :)
    – WOW
    Commented Aug 31, 2017 at 15:48
  • Did you get a chance to take a look at this problem @iant
    – WOW
    Commented Sep 3, 2017 at 21:25

1 Answer 1


The XML contains an invalid element bit: <wps:Input> <ows:Identifier>classification</ows:Identifier> <wps:Reference mimeType="image/tiff" xlink:href="http://geoserver/wcs" method="POST"> <wps:Body/> </wps:Reference> </wps:Input>

I don't know if the process really needs it (it does not seem to be mandatory), but it has to either be populated or removed entirely.

Seems like a bug in the process builder UI, feel free to report it at https://osgeo-org.atlassian.net/projects/GEOS/summary

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