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Is the GeometryFilter altering the data or the way the data is presented to the writer?

  • July 11, 2023
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ponceta
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I have a dynamic workflow that writes spatial data from a MS SQL Server to a postgis database. Since my inital data is not always restrictive on geometry types, I want to ensure that Geometry types are well defined in my destination database.

 

I had an issue with mixed lines and multilines that I solved using an aggregator (destination geometry (multilinestring) ) but I had some geometry collections creating some issues when writing data so I added a GeometryFilter.

 

Visually no feature is filtered (only lines) and the writing is doing great. Removing this filter will make the writing fail.

 

My question is then : Is the GeometryFilter altering the data or the way the data is presented to the writer?

 

image

Best answer by david_r

If you're using Simple mode in the GeometryFilter, FME will try to homogenize heterogeneous collections, see the manual, under Parameters / General / Mode:

https://docs.safe.com/fme/html/FME-Form-Documentation/FME-Transformers/Transformers/geometryfilter.htm

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2 replies

david_r
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  • david_rCelebrity
  • Best Answer
  • July 11, 2023

If you're using Simple mode in the GeometryFilter, FME will try to homogenize heterogeneous collections, see the manual, under Parameters / General / Mode:

https://docs.safe.com/fme/html/FME-Form-Documentation/FME-Transformers/Transformers/geometryfilter.htm

ponceta
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  • poncetaContributor
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  • July 11, 2023

If you're using Simple mode in the GeometryFilter, FME will try to homogenize heterogeneous collections, see the manual, under Parameters / General / Mode:

https://docs.safe.com/fme/html/FME-Form-Documentation/FME-Transformers/Transformers/geometryfilter.htm

So there's actually some little magic behind the scenes! Thank you for your feedback!

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