Performs an overlay of points on areas.
The Group By parameter specifies a series of attributes that must match on the point and polygon features before the attributes will be merged. This can be used to ensure that the overlay occurs only on certain groups of features.
The Overlap Count Attribute added to output area features holds the number of point features that they contained.
If the optional List Name is supplied, the attributes of each area containing an output point are added to that point's list, and the attributes of each point contained by an output area are added to that area's list.
If Areas First is set to Yes, then the PointOnAreaOverlayer assumes that all AREA features will enter the transformer before any POINT features. This can reduce memory use of the PointOnAreaOverlayer if you have many POINT features to overlay. Any further AREA features that arrive after the first POINT feature will be logged with a warning and discarded.
If the Advanced setting Geometry Handling is set to Enhanced in the workspace, arcs are not accepted as points, and ellipses are accepted as areas and preserved as ellipses; otherwise, arcs are accepted as points, and ellipses are accepted as either points (located at their center points) or as stroked areas.
About Transformer Parameter Options
FME Professional edition and above
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