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Question

split polygons at dateline

  • April 19, 2017
  • 3 replies
  • 95 views
K
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Hello,

 

I have a polygon that crosses the dateline.

 

I would like to split it into two at the dateline, so I even won't need a dateline fix (e.g.https://knowledge.safe.com/articles/34013/dateline-problem.html). My goal is a longitude within -180 and 180 and a correct display on the map using LL-WGS84.

 

Is this possible? What transformers do I need to use?
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3 replies

jdh
Contributor
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  • jdhContributor
  • Contributor
  • April 19, 2017

One option would be to use the clipper with a clipper feature being a box -90, 90,-180,180. Make sure create aggregates is set to No, and you want the features from both the Inside and Outside ports.

erik_jan
Contributor
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  • erik_janContributor
  • Contributor
  • April 19, 2017

Another way would be to use the InterSector to Cut the area and an AreaBuilder to restore the 2 polygons:

With this result:

jdh
Contributor
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  • jdhContributor
  • Contributor
  • April 19, 2017

Another way would be to use the InterSector to Cut the area and an AreaBuilder to restore the 2 polygons:

With this result:

With the caveat that they must be simple polygon(s) with no holes or slivers, and you'll need to transfer the attributes if required.

 

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