Table 6.114—DRM_Geometry_Edge
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Property |
Description |
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Superclass |
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Class |
· <DRM Geometry Edge> |
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Subclass |
· none |
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Definition |
An instance of this DRM class is a one-dimensional <DRM Geometry Topology> instance consisting of an ordered collection of <DRM Location> instances connecting one <DRM Geometry Node> to another <DRM Geometry Node>. The orientation of a <DRM Geometry Edge> is defined by the order of its <DRM Location> components, taken in conjunction with its starting <DRM Geometry Node> and ending <DRM Geometry Node>. A <DRM Geometry Edge> is used to represent the location of a segment of: a. one or more <DRM Linear Geometry> instances, b. a boundary of one or more <DRM Geometry Face> instances, or c. both. |
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Example(s) |
· The segment (edge) connecting two <DRM Geometry Node> instances within a topological construct that is used to provide the topology of a <DRM Linear Feature> instance that represents the center line of a river. |
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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) |
· zero or more {ordered} <DRM Geometry Face>s1 · exactly two {ordered} <DRM Geometry Node>s2 |
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Associated by (one-way) (inherited) |
· none |
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Associated by (one-way) |
· zero or more <DRM Connected Geometry Edge>s through <DRM Edge Direction>s. · zero or more <DRM Geometry Face Ring> through <DRM Edge Direction>s |
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Associated with (two-way) (inherited) |
· none |
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Associated with (two-way) |
· zero or more <DRM Linear Geometry> through <DRM Edge Direction>s |
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Composed of (two-way) (inherited) |
· zero or one <DRM Geometry ID> |
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Composed of (two-way) |
· zero or more <DRM Same As Geometry Edge> |
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Composed of (two-way metadata) (inherited) |
· none |
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Composed of (two-way metadata) |
· none |
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Component of (two-way) (inherited) |
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Component of (two-way) |
· none |
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Constraints |
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Notes |
1 The <DRM Geometry Face> (if any) that are bordered by this <DRM Geometry Edge>, ordered counterclockwise when looking along the <DRM Geometry Edge>. The converse of this relationship is that between <DRM Geometry Face Ring> and <DRM Geometry Edge>. 2 This association specifies that the <DRM Geometry Edge> is "bounded by" the <DRM Geometry Node>s. The first <DRM Geometry Node> is the starting node of the <DRM Geometry Edge>, while the second <DRM Geometry Node> is the ending node. |
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Class diagram |