FME Transformers: 2024.1

Categories
Geometries
Related Transformers
AreaAmalgamator
Dissolver
DonutBridgeBuilder
DonutBuilder
HoleCounter

DonutHoleExtractor

Separates donut polygons into outer shell and hole polygons.

Jump to Configuration

Typical Uses

  • Creating geometry for holes
  • Filling in holes to create non-donut areas

How does it work?

The DonutHoleExtractor receives features with donut area geometry and separates the holes from the outer shell of the polygon, creating individual geometry for each hole.

Features are output as either Outershell or Hole. All output features have non-donut area geometry.

In the case of nested donuts - such as a lake on an island in a lake - holes that contain a smaller hole are output twice, via both the Outershell and Hole output ports.

Aggregates may be either deaggregated or rejected.

Features with invalid or non-area geometry are rejected.

Examples

Usage Notes

Creating and Modifying Area Features

These transformers work with polygons in a variety of ways.

Configuration

Input Ports

Output Ports

Parameters

Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

For more information, see Transformer Parameter Menu Options.

Reference

Processing Behavior

Feature-Based

Feature Holding

No

Dependencies None
Aliases  
History  

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for all results about the DonutHoleExtractor on the FME Community.

 

Examples may contain information licensed under the Open Government Licence – Vancouver, Open Government Licence - British Columbia, and/or Open Government Licence – Canada.