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52North / ArcGIS-Server-SOS-Extension

The Sensor Observation Service (SOS) extension for ArcGIS Server is implemented as a so-called Server Object Extension (SOE). It allows querying of observations, procedures/sensors, as well as features observed by sensors. The interface is compliant with the SOS 2.0 standard from OGC.
http://52north.org/arcgisServerSOS
Apache License 2.0
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GetObservation returns wrong timespan #41

Open ridoo opened 10 years ago

ridoo commented 10 years ago

Sending a request containing timespan temporalFilter=om:phenomenonTime,2013-09-07T20:50:32.416+0200/2013-11-06T19:50:32.416+0100 returns an observation collection with

<om:phenomenonTime>
  <gml:TimePeriod gml:id="phenomenonTime-GB_Observation_107">
    <gml:beginPosition>1900-01-01T00:00:00</gml:beginPosition>
    <gml:endPosition>2013-09-07T19:00:00</gml:endPosition>
  </gml:TimePeriod>
</om:phenomenonTime>
ridoo commented 10 years ago

I see now that 1900-01-01T00:00:00 refers to the StartTime field. And only the first three values are related to that date. I think this interval is associated to the aggregationType which is here 1 hour.

<swe:values>
1900-01-01T00:00:00,2013-09-08T00:00:00,NOT_SET,NOT_SET,1h,29.0@@
1900-01-01T00:00:00,2013-09-09T00:00:00,NOT_SET,NOT_SET,1h,26.0@@
1900-01-01T00:00:00,2013-09-10T00:00:00,NOT_SET,NOT_SET,1h,16.0@@

<!-- from here the 1h aggregationType associates correctly to StartTime and EndTime -->

2013-09-07T18:00:00,2013-09-07T19:00:00,NOT_SET,NOT_SET,1h,80.0

<!-- following values are truncated for brevity -->

2013-09-10T18:00:00,2013-09-10T19:00:00,NOT_SET,NOT_SET,1h,49.0@@
</swe:values>

However, drawing a timeseries would need a time instant a value was measured at. Perhaps we can discuss if it might better to use the middle of the aggregation time period to be that time instant and add kind of validFrom and validUntil fields.

ridoo commented 10 years ago

TopicCenter has freezed the encoding format so the interval won't change anymore. I might have to check the OxF to use either start time, end time or calculate the middle of the time interval.

However, the issue with StartTime being 1900-01-01T00:00:00 remains.

ridoo commented 10 years ago

http://taskman.eionet.europa.eu/issues/16594