Abstract Class Name: Topology Hierarchy

Superclass - SEDRIS Abstract Base

Subclasses

• Perimeter Related Feature Topology
• Spatial Index Related Feature Topology

Definition

A spatially organized hierarchical collection of Feature Topology objects, which includes all of the Feature Topology objects that lie within a defined spatial extent, and are components of a single Aggregate Feature.

Primary Page in DRM Diagram:

• 11

Secondary Pages in DRM Diagram:

• 8

Example

1. The set of all Feature Topology objects contained within an independent topological surface, organized into a collection of regularly or irregularly shaped tiles.

FAQs

What is the purpose of this class?

This class allows Feature Topology objects to be spatially organized using different methods. It ensures that all Feature Topology objects, particularly those that are not directly associated with any Feature, have at least one containing object.

Constraints

Component of (two-way)

• one or more Aggregate Features