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Performs an overlay of points on areas.




Attribute Accumulation

If attributes on the incoming and original feature share the same name, but are not geometry attributes that start with fme_, then they are deemed conflicted.

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Usage Notes

  • Each point receives the attributes of the area(s) it is contained in, and each containing area receives the attributes of each point it contains. When attributes are merged between features, existing attributes are not replaced. Therefore, if the points and areas being overlaid have attributes with the same name, then the values will not be transferred from one to the other.  You can avoid this problem by renaming (AttributeRenamer), prefixing (AttributeExpressionRenamer), or removing (AttributeRemover) attributes to avoid name collisions.
  • Note that intersections between area features are not computed.
  • If a point falls exactly on the line between polygons, FME always include points on the boundary as being in. So if a point is on the boundary of two polygons, it will be called "in".
  • If you have a lot of features to process, you can improve overlay performance by also using the Clipper transformer. The Clipper also provides different options for a point that falls exactly on a line. See the Clipper example from the FME Knowledge Center for information on how to use less memory using the Clippers First parameter.
  • If you have a lot of Point features in particular, you can reduce memory usage of the PointOnAreaOverlayer by using the Areas First parameter.
  • Aggregates are not supported by this transformer.
  • Note that where Point geometries are expected as input, PointCloud geometries are not supported.

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

Geometric Operators

FME Licensing Level

FME Professional edition and above

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