8.11. ProximitySearchProcess

The ProximitySearchProcess performs a proximity search on a Geomesa feature collection using another feature collection as input. It accepts the following parameters:

Parameter	Description
inputFeatures	Input feature collection that defines the proximity search
dataFeatures	The data set to query for matching features
bufferDistance	Buffer size in meters

8.11.1. Proximity Search Example

The following XML is an example of the ProximitySearchProcess:

<?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: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>geomesa:ProximitySearch</ows:Identifier>
  <wps:DataInputs>
    <wps:Input>
      <ows:Identifier>inputFeatures</ows:Identifier>
      <wps:Reference mimeType="text/xml; subtype=wfs-collection/1.0" xlink:href="http://geoserver/wps" method="POST">
        <wps:Body>
          <wps:Execute version="1.0.0" service="WPS">
            <ows:Identifier>geomesa:Query</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" xmlns:cabs="cabs">
                      <wfs:Query typeName="cabs:Cabs_features"/>
                    </wfs:GetFeature>
                  </wps:Body>
                </wps:Reference>
              </wps:Input>
              <wps:Input>
                <ows:Identifier>filter</ows:Identifier>
                <wps:Data>
                  <wps:ComplexData mimeType="text/plain; subtype=cql"><![CDATA[CabId = 367152240]]></wps:ComplexData>
                </wps:Data>
              </wps:Input>
            </wps:DataInputs>
            <wps:ResponseForm>
              <wps:RawDataOutput mimeType="text-xml; subtype=wfs-collection/1.0">
                <ows:Identifier>result</ows:Identifier>
              </wps:RawDataOutput>
            </wps:ResponseForm>
          </wps:Execute>
        </wps:Body>
      </wps:Reference>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>dataFeatures</ows:Identifier>
      <wps:Reference mimeType="text/xml; subtype=wfs-collection/1.0" xlink:href="http://geoserver/wps" method="POST">
        <wps:Body>
          <wps:Execute version="1.0.0" service="WPS">
            <ows:Identifier>geomesa:Query</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" xmlns:cabs="cabs">
                      <wfs:Query typeName="cabs:Cabs_features"/>
                    </wfs:GetFeature>
                  </wps:Body>
                </wps:Reference>
              </wps:Input>
              <wps:Input>
                <ows:Identifier>filter</ows:Identifier>
                <wps:Data>
                  <wps:ComplexData mimeType="text/plain; subtype=cql"><![CDATA[NOT(CabId = 367152240)]]></wps:ComplexData>
                </wps:Data>
              </wps:Input>
            </wps:DataInputs>
            <wps:ResponseForm>
              <wps:RawDataOutput mimeType="text-xml; subtype=wfs-collection/1.0">
                <ows:Identifier>result</ows:Identifier>
              </wps:RawDataOutput>
            </wps:ResponseForm>
          </wps:Execute>
        </wps:Body>
      </wps:Reference>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>bufferDistance</ows:Identifier>
      <wps:Data>
        <wps:LiteralData>20</wps:LiteralData>
      </wps:Data>
    </wps:Input>
  </wps:DataInputs>
  <wps:ResponseForm>
    <wps:RawDataOutput mimeType="application/json">
      <ows:Identifier>result</ows:Identifier>
    </wps:RawDataOutput>
  </wps:ResponseForm>
</wps:Execute>

Assuming the above XML is in a file named ProximitySearchProcess_wps.xml, it can be invoked with the following curl to GeoServer:

curl -v -u admin:geoserver -H "Content-Type: text/xml" -d@ProximitySearchProcess_wps.xml localhost:8080/geoserver/wps