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The sampled feature of The sampled feature of hydrologic observationhydrologic observation
Hydrology Domain Working Group at the OGC/TC Meeting, Austin, 2012, Mar 19-23
Irina Dornblut, Global Runoff Data Centre of WMORob Atkinson, CSIRO Land and Water
OGC®
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SampledFeatureSampledFeature of hydrologic observation of hydrologic observation
2
1. Observation relationships (outline)
2. Examples of domain-specific featureOfInterest
3. Identification of hydrologic features (HY_Features)
4. OGC 11-039r2 Discussion paper:
« HY_Features: a Common Hydrologic Feature Model »
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Hydrologic Observation Hydrologic Observation
3
Observation, spec.MEASUREMENT
6.700 km
FeatureOfInterest: RIVER
HydrologicObservable: RIVER LENGTH
Phenomeonon: LENGTH
AMAZON RIVER(water body)
UoM: UoM LENGTH
event, e.g. measurement, where the value of a property of a particular feature of interest is determined …
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MEASUREMENT
OBIDOS(station)
180.000 m³/s
AMAZON RIVER(water body)
DomainFeature: (entire) RIVER
HydrologicObservable:RIVER DISCHARGE
SamplingFeature: MONITORING STATION
SampledFeature:RIVER
UoM: UoM_FLOW
… using a sampling feature,
Phenomenon: FLOW (V T-1)
Hydrologic Observation Hydrologic Observation determines the value of a property of a particular hydrologic feature of interest …
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Hydrologic Observation Hydrologic Observation determines the value of a property of a particular hydrologic feature of interest …
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MEASUREMENT
OBIDOS(station)
180.000 m³/s
AMAZON RIVER(water body)
Gauging SENSOR “abc”
(instrument)
Procedure: INSTRUMENT
… using a sampling feature,
… applying a procedure,SamplingFeature:
MONITORING STATION
SampledFeature:RIVER
DomainFeature: (entire) RIVER
HydrologicObservable:RIVER DISCHARGE
Phenomenon: FLOW (V T-1)
UoM: UoM_FLOW
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Hydrologic Observation Hydrologic Observation determines the value of a property of a particular hydrologic feature of interest …
6
MEASUREMENT
OBIDOS(station)
AMAZON RIVER(water body)
SENSOR(instrument)
Procedure: INSTRUMENT
SamplingFeature: MONITORING STATION
SampledFeature:RIVER
DomainFeature: BASIN
HydrologicObservable:RIVER DISCHARGE
AMAZON basin
… using a sampling feature,
… applying a procedure,
Phenomenon: FLOW (V T-1)
7.000 km³/a
180.000 m³/s
HydrologicObservable:FRESHWAtER FLUX
… in place of a property of the „ultimate subject of observation“ (O&M).
UoM: UoM_FLOW
Representation: WATER BODY
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Hydrologic Observation Hydrologic Observation determines the value of a property of a particular hydrologic feature of interest …
7
MEASUREMENT
AIRPORT XYZ(station)
COLORADO RIVER(accumulating water body)
RAIN GAUGE(instrument)
Procedure: INSTRUMENT
SamplingFeature: MONITORING STATION
SampledFeature: PRECIPITATION
DomainFeature: BASIN
HydrologicObservable:DISCHARGE
COLORADObasin
… using a sampling feature,
… applying a procedure,
Phenomenon: FLOW, HEIGHT
mm / km²
... m3 s
HydrologicObservable:AERIAL PRECIP
… in place of a property of the „ultimate subject of observation“ (O&M).
UoM: UoM_FLOW,
UoM_HEIGHT
RAINFALL
Representation: Water Body
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class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
GFI_Feature (ISO 19159:2011, O&M)GFI_Feature (ISO 19159:2011, O&M)
8
any feature type associated with a domain
of discourse
carries the observed property
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SF_SamplingFeature (ISO 19159:2011, O&M)SF_SamplingFeature (ISO 19159:2011, O&M)
9
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
feature intended to sample some ‚real-
world‘ object
OGC®
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class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
GFI_DomainFeature (ISO 19159:2011, O&M)GFI_DomainFeature (ISO 19159:2011, O&M)
10
‚real-world‘ object whose properties are under observation
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class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
PhenomenonPhenomenon (ISO 19159:2011, O&M) (ISO 19159:2011, O&M)
11
+observedProperty
Phenomenon
ObservableProperty(under development)
properties under observation
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
12
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier
Snow gauge
e.g. snow depth
+observedProperty
+observableProperty
OGC®
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
13
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier Aquifer
Measuring
PointObservation
Well
e.g. groundwater
table
+observedProperty
+observableProperty
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
14
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier Aquifer Lake
Measuring
PointExtracting
WellGauging
Site
e.g. water level
+observedProperty
+observableProperty
River
OGC®
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
15
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier Aquifer Lake River
Measuring
PointExtracting
WellObserving
PostCross-Section
e.g. sediment discharge
+observedProperty
+observableProperty
Channel
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
16
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier Aquifer Lake River Basin
Measuring
PointExtracting
WellObserving
PostGauging
StationHydrometric
Station
e.g. freshwater flux
+observedProperty
+observableProperty
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
17
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier Aquifer Lake River Basin Reporting
Region
Measuring
PointExtracting
WellObserving
PostGauging
StationHydrometric
StationReference
Station
e.g. ecological potential
+observedProperty
+observableProperty
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featureOfInterest – featureOfInterest – hydrologic exampleshydrologic examples
18
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
Glacier Aquifer Lake River Basin Reporting
Region Hydrologic Feature
Measuring
PointExtracting
WellObserving
PostGauging
StationHydrometric
StationReference
StationSampling
Feature
+observedProperty
+observableProperty
Observable
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Sampling Feature (Hydrology)Sampling Feature (Hydrology)
19
OGC® WaterML 2.0: Part 1- Timeseries
• Candidate OGC® standard (OGC 10-126r2)
• Definition of one special type of a spatial sampling feature, a MonitoringPoint,
• Description of an in-situ point of observation (e.g. gauging station).
Measuring
PointExtracting
WellObserving
PostGauging
StationHydrometric
StationReference
StationMonitoring
Station
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HY_Features (OGC 11-039r2)
• Semantic relationships of features that are objects of study and reporting in hydrology,
• Identification of these features independent from scales,
• Link the multiple concepts of the hydrology phenomenon to the shared unit of study or reporting
Glacier Aquifer Lake River Basin Reporting
Region Hydrologic Feature
Sampled Feature (Hydrology)Sampled Feature (Hydrology)
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
21
Glacier Aquifer …… River
Basin Reporting
Region
Measuring
PointExtracting
WellObserving
PostGauging
StationHydrometric
StationReference
Station
Hydrology phenomenon: waters above, on and below the land surface, accumulated in
water bodies or aquifers, confined by the occupied landform, … (real world)
Unit of study / reporting: catchment, spec. basin (abstract notion)
Observation: Hydrometric stations, observing posts, …
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
22
Hydrology phenomenon (real world)
Unit of study/reporting (abstract notion)
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
23
Waters
• Accumulated in water bodies and bearing aquifers
• Aggregated in a hydrographic network
• Confined by the occupied landforms
• Observed using sampling features
Represent
• Basin: Physiographic unit determined by a common outlet (outfall) into which all waters flow
• Catchment: Reporting unit, that may be, or may not be, hydrologically determined
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
24
Outfall: topological concept
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
25
Outfall: logic point
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
26
OGC®
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
27
OGC®
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
28
Hydrology phenomenon (real world)
Unit of study/reporting (abstract notion)
OGC®
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
29
Hydrology phenomenon (real world)
Unit of study/reporting (abstract notion)Application-specific - Independent from scales - Across sub-disciplines
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Hydrologic Feature Model (Hydrologic Feature Model (HY_FeaturesHY_Features))
30
Hydrology phenomenon (real world)
Unit of study/reporting (abstract notion)
Glacier Aquifer …… River
Basin Reporting
Region
Measuring
PointExtracting
WellObserving
PostGauging
StationHydrometric
StationReference
Station
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sampledFeaturesampledFeature of hydrologic observation of hydrologic observation
31
?
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Copyright © 2012, Open Geospatial Consortium, Inc
class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
domainFeaturedomainFeature of hydrologic observation of hydrologic observation
32
OGC®
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class Context diagram: GFI_Feature
«FeatureTyp...GFI_Feature
«FeatureType»observ ation::
OM_Observ ation
«FeatureType»samplingFeature::SF_SamplingFeature
«informative»GFI_DomainFeature
«metaclass»General Feature Model::
GF_FeatureType
«instanceOf»
+propertyValueProvider 0..*Domain
+featureOfInterest
1
0..*
+relatedObservation 0..*
«informative»
Intention
+sampledFeature
1..*
Name:Package:Version:Author:
Context diagram: GFI_Feature«requirementsClass» General Feature Instance1.0Simon Cox
domainFeaturedomainFeature of hydrologic observation of hydrologic observation
33
OGC®
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sampledFeaturesampledFeature of hydrologic observation of hydrologic observation
34
?
ISO19156(2011):O&MISO19159:O&M
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Domain-specific instance of Domain-specific instance of GF_FeatureTypeGF_FeatureType
35
OGC®
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required component of required component of Hydrologic MetadataHydrologic Metadata
36
Hydrologic Metadata, e.g.
of
GTN-H / WIGOS
GRDC
OGC®
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Discussion paper OGC 11-039r2Discussion paper OGC 11-039r2
HY_Features: a Common Hydrologic Feature Model
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Conventions
6 Requirements for a Common Hydrologic Feature Model
7 Common Hydrologic Feature Model - HY_Features
8 Further work9 References
37
OGC®
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HY_Features - HY_Features - future workfuture work
Alignment of concepts– HY_RiverPositioningSystem and ISO19111, ISO19133– HY_HydrometicNetwork and WaterML2– HY_SubsurfaceWater and GroundwaterML– HY_HydroObservable and Phenomenon (O&M)
Integration in the OGC Feature landscape
Integration in the WIGOS Metadata concept
38
OGC®
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HY_Features HY_Features – where available ?– where available ?
– Discussion Paper (OGC 11-039r2, 24 Feb 2012)– HTML documentation (OGC 12-021, 23 Feb 2012)
– XML schema definitions at SVN repository at SDSC (https://svn.sdsc.edu/repo/WaterML/GRDC/trunk)
– XML schema definitions at OGC schema repository (http://schemas.opengis.net/hydrology/) – asap
– Atkinson, R., I. Dornblut and D. Smith, An international standard conceptual model for sharing references to hydrologic features. Journal of Hydrology, 2012, 424-425(2012): p.24-36
Thank you for attention!
39
OGC®
Copyright © 2012, Open Geospatial Consortium, Inc
Discussion paper OGC 11-039r2Discussion paper OGC 11-039r2
HY_Features: a Common Hydrologic Feature Model
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Conventions
6 Requirements for a Common Hydrologic Feature Model
7 Common Hydrologic Feature Model - HY_Features
8 Further work9 References
40