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PointOnAreaOverlayer not producing expected results

  • March 28, 2025
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scarter
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Hello Forum,

I am experiencing an unexpected problem with what should be a simple point in polygon search process in FME Form.

 

I have a Creator connecting to…

FeatureReader -  reading in a point dataset of 16255 records

FeatureReader - reading in a polygon dataset, which covers a smaller area of what the points do

 

 

The two FeatureReaders feed into a PointOnAreaOverlayer.

 

But when I run the workspace 16255 point records are found. The number should be far smaller.

 

Thanks.

 

Best answer by DanAtSafe

Hi ​@scarter All points will pass through the PointOnAreaOverlayer.  Maybe you want to use a SpatialFilter?  Both transformers are similar.  With the PointOnAreaOverlayer, check the value of “_overlaps” and then filter on that with a Tester.

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    DanAtSafe
    Safer
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    • DanAtSafeSafer
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    • March 28, 2025

    Hi ​@scarter All points will pass through the PointOnAreaOverlayer.  Maybe you want to use a SpatialFilter?  Both transformers are similar.  With the PointOnAreaOverlayer, check the value of “_overlaps” and then filter on that with a Tester.

    nielsgerrits
    scarter
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    • scarterContributor
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    • March 28, 2025

    Thanks for that, ​@DanAtSafe . Yes, the SpatialFilter done the job. It’s clearly more straight forward for point in polygon queries.

     

    Noted on the need for _overlaps tester when using the PointOnAreaOverlayer.

     

    Thanks again.

     

     

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