OpenCities Map CONNECT Edition Help

Topology Creation

The following topology creation tools are found in the Topology ribbon group which can be accessed from the Map Topology workflow.

Name Icon Description
Create Shapes
Constructs simple or complex shapes from linear elements that share consecutive common endpoints and together define or infer a closed shape.
Create Centroids
Places a point element at the approximate center of an area. The area can be a shape or be defined by delineated by boundaries.
Associate Linkages
Copies the database linkages to centroids, boundaries and area elements.
Validate Topology
Tests that the topology is represented by boundaries which surround centroids, or that there is one centroid per area.

In addition to the above, the Edit / Modify ribbon group contains the following tools:

Name Icon Description
Merge Polygons
Merges two polygons into one.
Split Polygons
Splits a selected polygon into two polygons