| Created: | 7/7/2008 4:58:56 PM |
| Modified: | 11/30/2011 11:22:21 AM |
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The class GFI_Feature (Figure 2) is an instance of the «metaclass» GF_FeatureType (ISO 19109). It represents the set of all classes which are feature types. <br /></p><p>NOTE GFI_Feature is implemented in GML (ISO 19136:2007) by the element gml:AbstractFeature and type gml:AbstractFeatureType. <br /></p><p>In an implementation this abstract class shall be substituted by a concrete class representing a feature type from an application schema associated with a domain of discourse (ISO 19109, ISO 19101). Sampling Features (Clause 8) are a class of feature-types whose role is primarily associated with observations. <br /></p>
- Associations From
- Tagged Values
- Other Links
| Element | Source Role | Target Role |
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«featureType» ObservingCapability Class |
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Name: featureOfInterest -- Definition -- This feature is the real-world object whose properties are under observation, or is a feature intended to sample the real-world object |
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«FeatureType» SF_SamplingFeature Class |
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Name: sampledFeature A sampling feature is established in order to make observations concerning some domain feature. The association Intention shall link the SF_SamplingFeature to the feature which the sampling feature was designed to sample. The target of this association has the role sampledFeature with respect to the sampling feature, and is usually a real-world feature from an application domain (Figure 5; Figure 10). EXAMPLE A profile typically samples a water- or atmospheric-column; a well samples the water in an aquifer; a tissue specimen samples a part of an organism |
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A sampling feature is established in order to make observations concerning some domain feature. The association <i>Intention</i> shall link the SF_SamplingFeature to the feature which the sampling feature was designed to sample. The target of this association has the role <i>sampledFeature </i>with respect to the sampling feature, and is usually a real-world feature from an application domain (Figure 5; Figure 10). <br /></p><p>EXAMPLE A profile typically samples a water- or atmospheric-column; a well samples the water in an aquifer; a tissue specimen samples a part of an organismMultiple associations may be present, since a sampling feature may be used in the characterization of more than one domain feature. <br /></p><p>EXAMPLE A borehole may sample multiple geologic units. <br /></p>
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«FeatureType» OM_Observation Class |
Name: propertyValueProvider Pointer to an observation that provides an estimate of a property value |
Name: featureOfInterest The association Domain shall link the OM_Observation to the GFI_Feature (B.2.1) that is the subject of the observation and carries the observed property. This feature has the role featureOfInterest with respect to the observation. This feature is the real-world object whose properties are under observation, or is a feature intended to sample the real-world object, as described in Clause 8 of this standard. An observation instance serves as a propertyValueProvider for its feature of interest. |
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The association <i>Domain</i><b> </b>shall link the OM_Observation to the GFI_Feature (B.2.1) that is the subject of the observation and carries the observed property. This feature has the role <i>featureOfInterest</i> with respect to the observation. This feature is the real-world object whose properties are under observation, or is a feature intended to sample the real-world object, as described in Clause 8 of this standard. An observation instance serves as a <i>propertyValueProvider</i> for its feature of interest.
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| Tag | Value |
| byValuePropertyType | false |
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Values: true | false
Default: false Description: enforce the 'by value' property pattern without xlinks |
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| isCollection | false |
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Values: true | false
Default: false Description: attribute group gml:AggregationAttributeGroup is added to the complex type of the feature type |
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| noPropertyType | false |
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Values: true | false
Default: false Description: suppress automatic creation of *PropertyType complexType |
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| xsdDerivation | true |
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Values: true | false
Default: true Description: class implemented as new type + element, or by applying constraints only |
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| Object | Type | Connection | Notes |
| «informative» GFI_DomainFeature | Class | Generalization | |
| «FeatureType» SF_SamplingFeature | Class | Generalization | |
| «metaclass» GF_FeatureType | Class | Dependency |