Getting observations¶
A GetObservation operation request contains parameters that constrain the observations to be retrieved from a SOS.
Here the most important requirements of an SOS server implementation.
Requirement 29 (OGC 12-006)
The SOS returns all observations that match the specified parameter values. The filter parameters (e.g., observedProperty , procedure , or temporalFilter) shall be connected with an implicit AND. The values of each of the parameters shall be connected with an implicit OR. [http://www.opengis.net/spec/SOS/2.0/req/core/go-parameters]
Requirement 30 (OGC 12-006)
If an optional parameter of a GetObservation request is not included in the request, the filter (represented by the parameter) shall not be applied to the observation set which will be returned by the SOS server. [http://www.opengis.net/spec/SOS/2.0/req/core/go-omitting-parameters]
For example, in consequence of Requirement 30, an SOS server returns observations of all time to the client if the temporal filter is omitted.
| Name | Multiplicity and use |
|---|---|
| procedure | Zero or many (Optional) |
| offering | Zero or many (Optional) |
| observedPropertiy | Zero or many (Optional) |
| temporalFilter | Zero or many (Optional) |
| featureOfInterest | Zero or one (Optional) |
| spatialFilter | Zero or one (Optional) |
| responseFormat | Zero or one (Optional) |
The KVP requests¶
Data array result:
temporalFilter=om:phenomenonTime,2012-11-19T14:00:00+01:00/2012-11-19T14:15:00+01:00
Temporal filtering
Filter by phenomenonTime:
Time periods: temporalFilter=om:phenomenonTime,2017-06-12T00:00:00+02:00/2017-07-13T00:00:00+02:00
Time instant: temporalFilter=om:phenomenonTime,2017-06-12T12:10:00+02:00
Latest: temporalFilter=om:phenomenonTime,latest
Last week: temporalFilter=om:phenomenonTime,lastweek
Last week stats: temporalFilter=om:phenomenonTime,lastweekstats
