OGC WaterML 2.0 OGC 10-126r3
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Figure 8 - Observation metadata
ObservationMetadata, defined as a specialisation of the ISO19115 MD_Metadata type, adds observation specific metadata; each property is described in the following sections.
9.4.1.8.1 intendedObservationSpacing
This defines the expected duration between individual observations. It is common that observations will occur frequently such as those performed by automated sensors or regular
visits; this property allows specification of expected time between measurements. This is reflected in the individual points that make up the resulting time series, but there are cases where
the observation interval does not match the intended observation interval. One example would be an increased observation interval intended to capture an event such as a peak in flood. Note there
is also the spacing property for Timeseries that is a stricter definition, allowing regularly spaced equidistant time series to be encoded see section 9.12.3.1.2 for a full description.
9.4.1.8.2 status
The status is used as a general categorisation of the state of an observation often relating to the level of validation that has occurred to the data. This property will most likely reference a term in
code list e.g. ‘Validated’, ‘Provisional’. WaterML2.0 does not currently define a code list for the list of potential statuses. This will be addressed in future vocabulary work.
«Type»
Observ ationMetadata
+ intendedObservationSpacing :TM_PeriodDuration [0..1] + status :StatusCode [0..1]
+ sampledMedium :SampledMediumCode [0..1] + maximumGap :TM_PeriodDuration [0..1]
+ parameter :NamedValue [0..]
Metadata entity set information::MD_Metadata
+ fileIdentifier :CharacterString [0..1] + language :CharacterString [0..1]
+ characterSet :MD_CharacterSetCode [0..1] = utf8 + parentIdentifier :CharacterString [0..1]
+ hierarchyLevel :MD_ScopeCode [0..] = dataset + hierarchyLevelName :CharacterString [0..]
+ contact :CI_ResponsibleParty [1..] + dateStamp :Date
+ metadataStandardName :CharacterString [0..1] + metadataStandardVersion :CharacterString [0..1]
+ dataSet :CharacterString [0..1] + locale :PT_Locale [0..]
«CodeList»
SampledMediumCode
«FeatureType»
observ ation:: OM_Observ ation
«CodeList»
StatusCode
0.. +relatedObservation 0..
Metadata+metadata 0..1
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9.4.1.8.3 sampledMedium
