Types of Topology Rules Governing Points, Lines, and Polygons on Points Lines, and Polygons (Especially for GATE-Geospatial 2022)

Doorsteptutor material for CTET/Paper-2 is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of CTET/Paper-2.

Examrace Books on Mapping, GIS, and Remote Sensing prepares you throughly for a wide range of practical applications.

There are many topology rules you can implement in your geodatabase, depending on the spatial relationships that are most important for your organization to maintain. There are three topology rules are given:

This Diagrma Shows Three Topology Rules

1. Points

Points on Points

Figure Shows Points on Points Rule

Points on Lines

Figure Shows Points on Lines Rule
  • Must be covered by endpoint of point must be covered by line.
  • Use this rule when you want to model points that are coincident with the ends of lines.
  • Use this rule when you want to model points that are coincident with lines.

Points on Polygons

Figure Shows Points on Polygons Rule
  • Must be properly inside polygons must be covered by boundary
  • Use this rule when you want points to align with the boundaries of polygons.

2. Lines

Lines on Points

Figure Shows Lines on Points Rule
  • Endpoint must be covered

Lines on Lines

Figure Shows Lines on Lines Rule
  • Must not overlap with
  • Must be covered by feature class

Lines on Polygons

Figure Shows Lines on Polygons Rule
  • Must be covered by boundary

3. Polygons

Polygons on Points

Figure Shows Polygons on Points Rule
  • Contains point
  • Use this rule to make sure that all polygons have at least one point within their boundaries. Overlapping polygons can share a point in that overlapping area.

Polygons on Lines

Figure Shows Polygons on Lines Rule
  • Boundary must be covered by

Polygons on Polygons

Figure Shows Polygons on Polygons Rule
  • Must be covered by feature class
  • Use this rule when each polygon in one feature class or subtype should be covered by all the polygons of another feature class or subtype.
  • Must not overlap with
  • Use this rule when polygons from one feature class or subtype should not overlap polygons of another feature class or subtype.

Developed by: