8.10. Point2PointProcess

The Point2PointProcess aggregates a collection of points into a collection of line segments. It accepts the following parameters:

Parameter	Description
data	Input feature collection
groupingField	Field on which to group
sortField	Field on which to sort (must be Date type)
minimumNumberOfPoints	Minimum number of points
breakOnDay	Break connections on day marks
filterSingularPoints	Filter out segments that fall on the same point

8.10.1. Point2Point Example

The following XML shows an example Point2Point process call:

<?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:Point2Point</ows:Identifier>
  <wps:DataInputs>
    <wps:Input>
      <ows:Identifier>data</ows:Identifier>
      <wps:Reference mimeType="text/xml" xlink:href="http://geoserver/wps" 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>groupingField</ows:Identifier>
      <wps:Data>
        <wps:LiteralData>CabId</wps:LiteralData>
      </wps:Data>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>sortField</ows:Identifier>
      <wps:Data>
        <wps:LiteralData>Date</wps:LiteralData>
      </wps:Data>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>minimumNumberOfPoints</ows:Identifier>
      <wps:Data>
        <wps:LiteralData>3</wps:LiteralData>
      </wps:Data>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>breakOnDay</ows:Identifier>
      <wps:Data>
        <wps:LiteralData>false</wps:LiteralData>
      </wps:Data>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>filterSingularPoints</ows:Identifier>
      <wps:Data>
        <wps:LiteralData>true</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 Point2PointProcess_wps.xml, it can be invoked with the following curl to GeoServer:

curl -v -u admin:geoserver -H "Content-Type: text/xml" -d@Point2PointProcess_wps.xml localhost:8080/geoserver/wps

The query should generate results that look like this:

{
  "type" : "FeatureCollection",
  "features": [
    {
      "id": "367152240-4",
      "geometry": {
        "coordinates": [ [ -13.4041, 37.8067 ], [ -13.4041, 37.8068 ] ],
        "type": "LineString"
      },
      "type": "Feature",
      "properties": {
        "Date_end": "2018-02-05T14:54:36.598+0000",
        "CabId": 367152240,
        "Date_start": "2018-02-05T14:53:58.078+0000"
      }
    }
  ]
}