These examples are equally spaced values in which the client must calculate the time for each value.

In case 1: measurement-timeseries-min-daily-discharge-monthly.xml
  • 1 month (wml2:spacing)
  • starting with November 2010 (wml2:baseTime)
  • Minimum in preceeding interval (wml2:interpolationType)
  • Actual Start is October 2010 (startAnchorPoint)
  • Daily Minumum (wml2:aggregationDuration)
 <wml2:MeasurementTimeseriesMetadata>
            <wml2:temporalExtent xlink:href="#period_of_rec"/>
              <wml2:baseTime>2010-11-01T00:00:00</wml2:baseTime>
              <wml2:spacing>P1M</wml2:spacing>
              <!-- Anchor point to indicate where the previous minimum is calculated to -->
              <wml2:startAnchorPoint>2010-10-01T00:00:00</wml2:startAnchorPoint>
              <wml2:aggregationDuration>P1D</wml2:aggregationDuration>
            </wml2:MeasurementTimeseriesMetadata>
         <wml2:defaultPointMetadata>
            <wml2:DefaultTVPMeasurementMetadata>
              <wml2:uom uom="cumecs"/>
              <wml2:interpolationType xlink:href="http://www.opengis.net/def/interpolationType/WaterML/2.0/MinPrec"
               xlink:title="Minimum in preceeding interval"/>
            </wml2:DefaultTVPMeasurementMetadata>
            </wml2:defaultPointMetadata>

When associate with a set of values:
 <!-- November but data describes October -->
          <wml2:point>
            <wml2:MeasurementTVP>
         <!-- 2010-10-01T00:00:00/2010-11-01T00:00:00 -->
              <wml2:value>0.72</wml2:value>
            </wml2:MeasurementTVP>
          </wml2:point>
          <wml2:point>
            <wml2:MeasurementTVP>
             <!-- 2010-10-01T00:00:00/2010-11-01T00:00:00 -->
          <wml2:value>0.588</wml2:value>
            </wml2:MeasurementTVP>
          </wml2:point>

use Case Collection Forecasting Example: collection-forecasting-example.xml

-- DavidValentine - 26 Jun 2012
Topic revision: r2 - 11 Jul 2012, PeterTaylor
 

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