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Creating a polygon from multiple surrounding polygons

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0

I am going to detect features from point cloud density raster map including hundreds of features.

To do that, first I detected the edges of features.

Then I exported into polygon shapefile, but the result is very complex.

Now I would like to merge these small polygons, fill the gaps and create one polygon, something like this.

Any suggestions?

arcgis-10.0 polygon-creation polyline-creation

share|improve this question

edited 4 mins ago

Sher

asked 2 hours ago

SherSher

17611

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You seem to be going the long way around the pond to convert polygons to lines and then back to polygons. Why not just Union the polygons then Dissolve.
  
  – Vince
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Vince, thanks for your comment. Polygons I had between two adjacent lines in the image, not between two double lines (wider area).
  
  – Sher
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please explain your problem more clearly. At one point you say you want "to create one lines" but later you say the end result should be a polygon. Perhaps some more mock-up images showing what you started with and what result you want would help. I'm with @Vince though. The Union and Dissolve tools should do what you want, I reckon.
  
  – Son of a Beach
  57 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How are you using Raster to Polygon? Can that be tweaked to get a better result initially? Possibly by using some raster processing before Raster to Polygon? What values are in the Raster, and which ones should be included in the final polygon?
  
  – Son of a Beach
  42 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I updated my question, hope it is more clear now.
  
  – Sher
  4 mins ago
  

  
  
  
  

add a comment | 

0

I am going to detect features from point cloud density raster map including hundreds of features.

To do that, first I detected the edges of features.

Then I exported into polygon shapefile, but the result is very complex.

Now I would like to merge these small polygons, fill the gaps and create one polygon, something like this.

Any suggestions?

arcgis-10.0 polygon-creation polyline-creation

share|improve this question

edited 4 mins ago

Sher

asked 2 hours ago

SherSher

17611

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You seem to be going the long way around the pond to convert polygons to lines and then back to polygons. Why not just Union the polygons then Dissolve.
  
  – Vince
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Vince, thanks for your comment. Polygons I had between two adjacent lines in the image, not between two double lines (wider area).
  
  – Sher
  1 hour ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please explain your problem more clearly. At one point you say you want "to create one lines" but later you say the end result should be a polygon. Perhaps some more mock-up images showing what you started with and what result you want would help. I'm with @Vince though. The Union and Dissolve tools should do what you want, I reckon.
  
  – Son of a Beach
  57 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How are you using Raster to Polygon? Can that be tweaked to get a better result initially? Possibly by using some raster processing before Raster to Polygon? What values are in the Raster, and which ones should be included in the final polygon?
  
  – Son of a Beach
  42 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I updated my question, hope it is more clear now.
  
  – Sher
  4 mins ago
  

  
  
  
  

add a comment | 

I am going to detect features from point cloud density raster map including hundreds of features.

To do that, first I detected the edges of features.

Then I exported into polygon shapefile, but the result is very complex.

Now I would like to merge these small polygons, fill the gaps and create one polygon, something like this.

Any suggestions?

arcgis-10.0 polygon-creation polyline-creation

share|improve this question

edited 4 mins ago

Sher

asked 2 hours ago

SherSher

17611

share|improve this question

edited 4 mins ago

Sher

asked 2 hours ago

SherSher

17611

share|improve this question

edited 4 mins ago

Sher

asked 2 hours ago

SherSher

17611

asked 2 hours ago

SherSher

17611

asked 2 hours ago

SherSher

17611

1 Answer
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0

I'm not clear on what you are trying to achieve. If you wish to create a polygon that is a simple solid area (like a filled in 'O'), then you'll fist need to close that gap, near the top in your image. If you wish to create a polygon that is open (like an unfilled 'U' or 'C' shape) then I guess you can leave that gap open.

You should start with your polygons - don't convert them to lines.

If you need to fill in that gap, then you would need to add an additional polygon feature using the editing tools, for example.

Once you have the gap closed (or if you do not need to close the gap), then you can use the 'Union' tool, with the NO GAPS setting.

Then dissolve the result.

If the result ends up with several polygons that don't quite touch enough to have been dissolved, you may want to manually close those gaps by using edit tools to create additional features. Or you could use the buffer tool with a very small buffer distance (depending on how accurate you need the result to be). Then try the Union and Dissolve again.

share|improve this answer

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718

add a comment | 

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0

I'm not clear on what you are trying to achieve. If you wish to create a polygon that is a simple solid area (like a filled in 'O'), then you'll fist need to close that gap, near the top in your image. If you wish to create a polygon that is open (like an unfilled 'U' or 'C' shape) then I guess you can leave that gap open.

You should start with your polygons - don't convert them to lines.

If you need to fill in that gap, then you would need to add an additional polygon feature using the editing tools, for example.

Once you have the gap closed (or if you do not need to close the gap), then you can use the 'Union' tool, with the NO GAPS setting.

Then dissolve the result.

If the result ends up with several polygons that don't quite touch enough to have been dissolved, you may want to manually close those gaps by using edit tools to create additional features. Or you could use the buffer tool with a very small buffer distance (depending on how accurate you need the result to be). Then try the Union and Dissolve again.

share|improve this answer

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718

add a comment | 

0

I'm not clear on what you are trying to achieve. If you wish to create a polygon that is a simple solid area (like a filled in 'O'), then you'll fist need to close that gap, near the top in your image. If you wish to create a polygon that is open (like an unfilled 'U' or 'C' shape) then I guess you can leave that gap open.

You should start with your polygons - don't convert them to lines.

If you need to fill in that gap, then you would need to add an additional polygon feature using the editing tools, for example.

Once you have the gap closed (or if you do not need to close the gap), then you can use the 'Union' tool, with the NO GAPS setting.

Then dissolve the result.

If the result ends up with several polygons that don't quite touch enough to have been dissolved, you may want to manually close those gaps by using edit tools to create additional features. Or you could use the buffer tool with a very small buffer distance (depending on how accurate you need the result to be). Then try the Union and Dissolve again.

share|improve this answer

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718

add a comment | 

I'm not clear on what you are trying to achieve. If you wish to create a polygon that is a simple solid area (like a filled in 'O'), then you'll fist need to close that gap, near the top in your image. If you wish to create a polygon that is open (like an unfilled 'U' or 'C' shape) then I guess you can leave that gap open.

You should start with your polygons - don't convert them to lines.

If you need to fill in that gap, then you would need to add an additional polygon feature using the editing tools, for example.

Once you have the gap closed (or if you do not need to close the gap), then you can use the 'Union' tool, with the NO GAPS setting.

Then dissolve the result.

If the result ends up with several polygons that don't quite touch enough to have been dissolved, you may want to manually close those gaps by using edit tools to create additional features. Or you could use the buffer tool with a very small buffer distance (depending on how accurate you need the result to be). Then try the Union and Dissolve again.

share|improve this answer

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718

share|improve this answer

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718

answered 49 mins ago

Son of a BeachSon of a Beach

1,531718