FME Desktop 2022: How to identify gaps between the polygons of same layer?
In the screenshot below, I have a layer that has 6 polygons. It’s easy to identify the overlaps between these polygons with the “AreaOnArea” tool but how gaps can be identified?
Perhaps you can try the AreaGapAndOverlapCleaner transformer?
1) The “AreaOnAreaOverlayer” tool doesn’t catch the gaps
2) The “AreaGapAndOverlapCleaner” tool doesn’t identify the gaps\\overlap but rather resolve
Is there a tool that can identify the gaps\\overlaps?
If you're looking for gaps, use the AreaGapAndOverlapCleaner, then use the repaired output as clippees and your original geom as the clipper. The Outside port will have the gap geometries
Thank you for the help.
My issue here is to identify the gaps and overlaps BUT not to resolve them
Of course, overlaps can be easily identified, but i couldn't figure out who to do so for gaps.
is this still be possible?
Sample data and workbench are attached
Take a look at the DonutHoleExtractor.
I used the "aggregator" tool (based on the autocad_hatch field) then the "DonutHoleExtractor" but fails to identify the gaps
Hi @jamal ,
Not sure if you solved this question. I've tried some sort of solution, and here is my output:
In total there are up to 20 gaps between your 6 geometries.
Here is the workflow:
Let me know if you have any doubts,
Keep talking,
Juanma,
I used the "aggregator" tool (based on the autocad_hatch field) then the "DonutHoleExtractor" but fails to identify the gaps
Use a Dissolver instead of an Aggregator.
Use a Dissolver instead of an Aggregator.
That's great. However, in my case, gaps need to be indentified between all polygons considering a certain tolerance (say 55 meter).
Then how to catch the indicate gab below as the tolerance is less than 55 meter
The data is attached
Use a Dissolver instead of an Aggregator.
Take the results of the Outershell port of the DonutHoleExtractor, buffer by your favorite tolerance, perform an AreaOnAreaOverlayer, keep only the features with _overlaps >= 2, clip with the results of the Outershell port of the DonutHoleExtractor, and keep only the results of the Outside port.
Thank you for the help.
My issue here is to identify the gaps and overlaps BUT not to resolve them
Of course, overlaps can be easily identified, but i couldn't figure out who to do so for gaps.
is this still be possible?
Sample data and workbench are attached
The solution I posted outputs the gaps on the Outside port on the Clipper
Thank you very much geomancer for the help. It works perfectly
My thanks are extended to Juanma for the other approach provided
I applied it on the k22.dwg and it works fine
The solution I posted outputs the gaps on the Outside port on the Clipper
Many thanks hkingsbury for the useful input
