Specialized observation procedures for OGC WaterML2.0
OGC WaterML 2.0 is an OGC Standard.
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A large number of direct in-situ hydrological observations are performed by a sensor or sensor system. Common types of sensors
include rain gauges, level gauges, quality sensors such as temperature, turbidity etc. Manual procedures may be also used to make measurements
at a particular sampling point. These may be ad-hoc visits to particular point that may be of interest, or continued visits to a well
identified sampling point. Procedures that generate derived or synthetic results also exist, such as those produced by algorithms or
simulations. Algorithms are commonly implemented in hydrological software to process data sets for reporting or other purposes. Examples
include: - Temporal interpolation or aggregation; - Spatial interpolation; - Quality assurance related tasks such as automatic spike removal
or gap filling; - Derivation of new observed phenomena such as calculation of volume from stage, discharge (flow) from stage
etc.
A defintion of the type of process used in the observation. This may be a Sensor, ManualMethod, Algorithm or Simulation
(including models).
A reference to the original source of the data. For example, if this is a post-processed time series (and processType is
algorithm), this link would specify the original process that generated the data, e.g. the sensor. This allows the origin of the data
to be maintained regardless of the processing that has occured to it.
If the process involves temporal aggregation of a result set, the time duration over which data has been aggregated should be expressed here. E.g. hourly, daily aggregates.
Specifies the datum that is used as the zero point for level measurements. This can be process-specific as opposed to the
gauge at the actual monitoring point.
Comments specific to the process from the operator or system performing the process.
Reference to an external process definition.
A list of the inputs used in the process. This may be a list of references to the data sets used (e.g. model input
series) or an input array to an algorithm.
A soft-typed parameter to allow arbitrary properties to be added to the description. This property uses the name-value type from ISO19156.
Describes the party responsible for performing the process. E.g. the person performing the method or operating the sensor.