I have generated the WPS request below using GeoServer's WPS Request Builder
. I wish to append more parameters to this request (geometry selection), and then send it either using GET or POST from within my OpenLayers JavaScript code. I can't seem to get information on how this can be done. How can I append geometry selection parameter to the request, and how can I send the request using OpenLayers? Any assistance will highly appreciated.
<?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">
<ows:Identifier>gs:Aggregate</ows:Identifier>
<wps:DataInputs>
<wps:Input>
<ows:Identifier>features</ows:Identifier>
<wps:Reference mimeType="text/xml; subtype=wfs-collection/1.0" xlink:href="http://geoserver/wfs" method="POST">
<wps:Body>
<wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2">
<wfs:Query typeName="learning_workspace:pop_layer"/>
</wfs:GetFeature>
</wps:Body>
</wps:Reference>
</wps:Input>
<wps:Input>
<ows:Identifier>aggregationAttribute</ows:Identifier>
<wps:Data>
<wps:LiteralData>pop</wps:LiteralData>
</wps:Data>
</wps:Input>
<wps:Input>
<ows:Identifier>function</ows:Identifier>
<wps:Data>
<wps:LiteralData>Sum</wps:LiteralData>
</wps:Data>
</wps:Input>
<wps:Input>
<ows:Identifier>singlePass</ows:Identifier>
<wps:Data>
<wps:LiteralData>Yes</wps:LiteralData>
</wps:Data>
</wps:Input>
</wps:DataInputs>
<wps:ResponseForm>
<wps:RawDataOutput mimeType="text/xml">
<ows:Identifier>result</ows:Identifier>
</wps:RawDataOutput>
</wps:ResponseForm>
</wps:Execute>
My environment: GeoServer 2.1.3, OpenLayers 2.11, PostGIS 1.5.
Best Answer
Incorporate filters within the
<wfs:Query><wfs:Query/>
section in a<Filter></Filter>
. The format of the filter is dependent on its type. More info on filters and examples is available here and here.As for requests, I used OpenLayers' POST method to send request, as illustrated below:
I hope this will be of help to someone.