Question

Polygon edges need to be flush against neighboring polygon

  • 2 January 2018
  • 8 replies
  • 2 views
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Hey everyone,

I have an interesting dilemma, I hope can be solved. I have an interior building spaces that have polygons for rooms. In between each room polygon is a gap that represents the wall. My objective is to somehow push the polygon edges towards one another in order to eliminate the gaps. I have tried numerous ways, including Densifier + Anchored Snapping (which works somewhat, but the polygons look funky), Generalizer + Anchored Snapping (again room polygons look funky) . Below is a screen shot of what it looks like.

Any assistance/thoughts would be greatly appreciated!

8 replies

erik_jan
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How about using a Bufferer to buffer all polygons by 0.5 the wall thickness?

Would that work?

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Thanks @erik_jan! I used the Bufferer transformer with a 0.5 tolerance, as suggested. It created the a polygon for the gaps (wall), however I need merge the gap polygons with the room polygons. I used the area on area overlayer to combine then used Dissolver, Grouped by: Name, to hopefully merge the two together. It worked for some, but not all. Would Dissolver be the most appropriate transformer for this task?buffer-gaps.png

erik_jan
Rank
Userlevel 2
Badge +16

Thanks @erik_jan! I used the Bufferer transformer with a 0.5 tolerance, as suggested. It created the a polygon for the gaps (wall), however I need merge the gap polygons with the room polygons. I used the area on area overlayer to combine then used Dissolver, Grouped by: Name, to hopefully merge the two together. It worked for some, but not all. Would Dissolver be the most appropriate transformer for this task?buffer-gaps.png

I believe the tolerance should be half the wall thickness, not 0.5.

 

Then you probably do not need the Dissolver as the buffer is added to the room.

 

 

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Thanks @erik_jan! I used the Bufferer transformer with a 0.5 tolerance, as suggested. It created the a polygon for the gaps (wall), however I need merge the gap polygons with the room polygons. I used the area on area overlayer to combine then used Dissolver, Grouped by: Name, to hopefully merge the two together. It worked for some, but not all. Would Dissolver be the most appropriate transformer for this task?buffer-gaps.png

But wouldn't the Buffer be an additional polygon? In the end it needs to look like the attached screenshot.end-result.png

 

 

The screenshot shows each room as one polygon and each polygon edges are joined. (No gaps).

 

erik_jan
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Userlevel 2
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But wouldn't the Buffer be an additional polygon? In the end it needs to look like the attached screenshot.end-result.png

 

 

The screenshot shows each room as one polygon and each polygon edges are joined. (No gaps).

 

The Bufferer enlarges the rooms by the buffer amount, it does not create a separate buffer geometry.

 

 

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The Bufferer enlarges the rooms by the buffer amount, it does not create a separate buffer geometry.

 

 

Ah okay. I did not know it did that. Do you know if there's a way to say to extend to your neighbor instead of specifying a specific distance? Some have a different distance. I can filter those out, but I rather not have multiple buffers.

 

 

Thanks for you help!
erik_jan
Rank
Userlevel 2
Badge +16
Ah okay. I did not know it did that. Do you know if there's a way to say to extend to your neighbor instead of specifying a specific distance? Some have a different distance. I can filter those out, but I rather not have multiple buffers.

 

 

Thanks for you help!
extend to your neighbor would be the Snapper (snapping type segment).

 

 

D
Badge +3

Hello,

I'm stuck at the some challenge.

What I got so far:

That's using the AreaGapAndOverlapCleaner. The GapCleaner needs a bit of help with a rectangular Bufferer and it turns out ok? Not great, but ok...

  • The Generalizer helps simplifying the geometry.

But I think the proper way would be to add the walls, split them by the middle axis and merge them with the room areas.

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