Builds connections between donut holes with the outer boundary of a donut, resulting in a polygon-equivalent representation of the input donut.
A single, connected path visits the boundary and each donut hole exactly once and guaranteed to not cross over itself completely if the input feature is properly oriented. This action is performed on all donuts contained in an input feature.
The transformer outputs unmodified features at the Invalid port when a feature contains a donut with faulty topology (such as a hole lying outside of an outer boundary).
Example
The generated polygon boundary will have shared, overlapping boundary segments where the rings connect to each other.
Another example shows a county in Washington, USA, consisting of several islands. The islands are cut from an expanded bounding box, and the workspace converts the remaining donut into a polygon:
Parameters
None
Editing Transformer Parameters
Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click 
beside the applicable parameter. For more information, see Transformer Parameter Menu Options.
Transformer Categories
Technical History
Associated FME function or factory: @Geometry
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