I have a polygon dataset of railway land, but it contain holes where items such as buildings, tracks and signal boxes would be. I need to fill in these holes to form a continuous polygon. The image below shows a sample of the data. I’d want to fill in holes like those marked in red. But I do not need to close spaces such as those marked in gold.
I’ve seen….
… but I don’t think that’s suitable for the task.
I’ve also looked at Dissolver, but I’m not sure if that's the right way to go.
Any ideas, please.
Thanks,
Stuart
Page 1 / 1
If they are proper holes, rather than gaps, I would actually try the DonutHoleExtractor.
Otherwise, the AreaAmalgamator set to Self Amalgamation, although that would also potentially generalize the outer hull and you may not want that.
Or maybe the HullAccumulator? This is my go to tool if I try to generate a boundary out of data like this.
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.
Did you not filter objects with holes prior to de HoleExtractor?
You can use the HoleCounter.
Donut in donut also works.
Hye, can we no loinger upload workspaces?
@gio I did not filter objects with holes prior to the HoleCounter. I’ll try that.
Hye, can we no loinger upload workspaces?
Tip: On the new forum we can only upload zipped workspaces.
Tip: On the new forum we can only upload zipped workspaces.