Table 6.193—DRM_Perimeter_Related_Features
Property |
Description |
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Superclass |
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Class |
· <DRM Perimeter Related Features> |
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Subclass |
· none |
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Definition |
An object of this DRM class specifies a <DRM Aggregate Feature> that spatially organizes its component <DRM Feature Hierarchy>s into a collection of (potentially) irregularly shaped regions, each defined by a <DRM Feature Perimeter Data> object. That is, each component <DRM Feature Hierarchy> is contained within the perimeter area specified by the <DRM Feature Perimeter Data> associated with that component. |
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Example(s) |
· The geographic extent of a thematic coverage might be divided up into a collection of tiles. Due to political boundaries or shorelines, some of these tiles might have irregular shapes. The <DRM Feature>s contained within each tile would be organized into one of the components of a <DRM Perimeter Related Features> object. |
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Inherited field elements |
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Field elements |
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Associated to (one-way) (inherited) |
· none |
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Associated to (one-way) |
· none |
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Associated by (one-way) (inherited) |
· zero or one <DRM Hierarchy Summary Item> |
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Associated by (one-way) |
· none |
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Associated with (two-way) (inherited) |
· zero or more <DRM Feature>s · zero or more <DRM Geometry Hierarchy>s · zero or more <DRM Property Grid>s |
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Associated with (two-way) |
· none |
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Composed of (two-way) (inherited) |
· zero or more {ordered} <DRM Attribute Set Index>s · zero or more <DRM Base Level Of Detail Data> · zero or one <DRM Classification Data> · zero or more <DRM Colour>s · zero or more <DRM Feature Topology Hierarchy> · zero or more {ordered} <DRM Image Mapping Function>s3 · zero or more <DRM Label>s · zero or one <DRM Perimeter Data> · zero or one <DRM Presentation Domain>4 · zero or more <DRM Property Description>s · zero or more <DRM Property Table>s · zero or more <DRM Property Table Reference>s · zero or more <DRM Property Value>s · zero or one <DRM Reference Surface> · zero or one <DRM Rendering Priority Level> · zero or more <DRM Sound Instance>s · zero or one <DRM Spatial Domain> · zero or one <DRM Time Constraints Data> |
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Composed of (two-way) |
· one or more <DRM Feature Hierarchy> through <DRM Perimeter Data> |
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Composed of (two-way metadata) (inherited) |
· zero or one <DRM Access> · zero or more <DRM Browse Media>s · zero or one <DRM Citation> · zero or more <DRM Cross Reference>s · zero or one <DRM Data Quality> · zero or one <DRM Description> · zero or one <DRM Keywords> · zero or one <DRM Point Of Contact> |
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Composed of (two-way metadata) |
· none |
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Component of (two-way) (inherited) |
· zero or more <DRM Alternate Hierarchy Related Features>s through <DRM Hierarchy Data>s · zero or more <DRM Classification Related Features>s through <DRM Classification Data>s · zero or one <DRM Environment Root> · zero or one <DRM Feature Model> · zero or more <DRM Level Of Detail Related Features>s through <DRM Base Level Of Detail Data>s · zero or more <DRM Oct Tree Related Features>s through <DRM Oct Tree Data>s · zero or more <DRM Perimeter Related Features>s through <DRM Perimeter Data>s · zero or more <DRM Quad Tree Related Features>s through <DRM Quad Tree Data>s · zero or more <DRM Spatial Index Related Features>s through <DRM Spatial Index Data>s · zero or more <DRM State Related Features>s through <DRM State Data>s · zero or more <DRM Time Related Features>s through <DRM Time Constraints Data>s · zero or more <DRM Union Of Features>s |
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Component of (two-way) |
· none |
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Constraints |
· Image mapping functions and texture coordinates |
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Notes |
1 If TRUE, for any object that exists 'below' this aggregation, each object will appear in only one 'branch' of this aggregation. If FALSE, objects may appear in multiple 'branches' of this aggregation. 2 If TRUE, each 'branch' strictly follows the rules of this aggregation. If FALSE, each 'branch' might bend the rules a bit. For example, if this is a spatial aggregation, a value of TRUE indicates that objects will not cross the spatial extents defined by this aggregation relationship, and a value of FALSE indicates that objects might cross those bounds. For another example, if this is a time-based aggregation, a value of TRUE indicates that all branches will only contain data valid for the times specified for each branch, and a value of FALSE indicates that the branches have the option of including data that falls outside of the specified time ranges for that branch. 3 Provided to support "attributes for derived objects.” That is, these components are used only to specify texture mapping information for geometry that is derived from the <DRM Feature> by the consumer. These <DRM Image Mapping Function>s shall use <DRM Image Anchor> components to specify the mapping. 4 This is needed because in many cases, an <DRM Aggregate Feature> may be significant only for a particular domain, e.g. radar. |
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Class diagram |