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Transforms or measures geometry features based on a specified algorithm.

There are four types of algorithms:

  • Generalizing algorithms: Reduce the density of coordinates by removing vertices.
  • Smoothing algorithms: Determine a new location for each vertex.
  • Measuring algorithms: Calculate the location of points, and return a list of these points (for example, to measure the sinuosity of a feature).
  • Fitting algorithms: Replace the original geometry completely, with a new feature fitted to a specified line (for example, to minimize the orthogonal distance to the original).


Each numeric parameter may be entered as a number or taken from the value of a feature attribute by selecting the attribute name from the pull-down list.

Usage Notes

To maintain topologies that involve other features while generalizing, consider using the SherbendGeneralizer transformer.

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


FME Licensing Level

FME Professional edition and above

Transformer History

This transformer replaces the AreaGeneralizer, AreaSmoother, LineGeneralizer and LineSmoother.

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Tags Keywords: abstraction "line thinning" "line thin"simplification simplify spike weeding NURBfit Wang Measure fit regression LineGeneralizer AreaGeneralizer AreaSmoother LineSmoother