Hi @jamiefinney, if you need to restore large holes, the DonutBuilder can be used after filtering the holes extracted through the DonutHoleExtractor.

yup D_holeExtractor, tester to filter small ones out and feed boundaries and larger holes to D_builder groupedBy object_id's

Like he said...

Thanks ​@gio and ​@takashi,

I’ve tried donutHoleExtractor. I get two results, through two ports: Outershell, Hole.

Outershell is exactly the same as the input. So, that one doesn’t do the job.

Hole port shows the cut out holes polygons like this example….

I can see how I could use these ‘hole’ polygons to merge with Outershell to give me the continuous polygon. However that wouldn’t work because the Hole polygons do not capture all of the holes, like this example…

I wonder if it that’s because some of the Holes contain small polygons, like a small island in a lake….

I’d need to capture holes like that those too. 

Thanks

The Outershell should be the outside of the polyons, with the holes omitted. Can you doublecheck that and if you do see a hole that you’re not expecting to see, check whether it’s really a hole. Maybe it’s connected to the outside with a really small sliver.