Table 6.143 — DRM_LOD_Related_Geometry
Property |
Description |
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Class |
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Superclass |
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Subclass |
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Definition |
An instance of this DRM class specifies an aggregation of <DRM Geometry Hierarchy> components in which each <DRM Geometry Hierarchy> component is an alternate representation of the same entity at a different level of detail. Each <DRM Geometry Hierarchy> component is a collection of <DRM Geometry Representation> instances with a different, possibly overlapping, <DRM Base LOD Data> link object field value, representing an alternative that should be used at different levels of such distinctions as viewing ranges, map scales, or spatial resolution. The lod_data_type field specifies the subclass of <DRM Base LOD Data> of each link object in the given organization. |
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Class diagram |
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Inherited field elements |
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Field elements |
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Default field values |
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Associated to (one-way) (inherited) |
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Associated to (one-way) |
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Associated by (one-way) (inherited) |
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Associated by (one-way) |
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Associated with (two-way) (inherited) |
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Associated with (two-way) |
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Composed of (two-way) (inherited) |
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Composed of (two-way) |
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Composed of (two-way metadata) (inherited) |
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Composed of (two-way metadata) |
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Component of (two-way) (inherited) |
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Component of (two-way) |
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Constraints |
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Clarifications |
1An association between a <DRM Feature Representation> instance and a <DRM Geometry Hierarchy> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship. 2An association between two <DRM Geometry Hierarchy> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship. 3An association between a <DRM Feature Representation> instance and a <DRM Geometry Hierarchy> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship. 4An association between two <DRM Geometry Hierarchy> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship. 5An association from a <DRM Hierarchy Summary Item> instance to a <DRM Geometry Hierarchy> instance indicates that the <DRM Hierarchy Summary Item> instance summarizes that <DRM Geometry Hierarchy> instance. 6An association from a <DRM Reference Surface> instance to a <DRM Geometry Hierarchy> instance indicates that the <DRM Geometry Hierarchy> instance organizes the geometric objects that specify the reference surface geometry of the <DRM Reference Surface> instance. 7In the case where multiple <DRM Collision Volume> components are specified for the <DRM Aggregate Geometry> instance, the union of the volumes thus specified is used in collision detection. 8A <DRM Aggregate Geometry> instance can have a <DRM LSR Transformation> component only when the <DRM Aggregate Geometry> instance is within the scope of an LSR 3D SRF. |
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Example(s) |
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