Skip to main content
Solved

Deleting polygons which have the same coordinates (duplicates)

  • April 1, 2013
  • 1 reply
  • 12 views

robertr
Contributor
Forum|alt.badge.img+6

Hello, 

I was wondering if this can be done with an operator? Many times, I see polygon shapefiles which have a feature duplicated even 1,000 times (same coordinates).

Let's say that I need a clean shapefile, and I want to get rid of the polygons which are duplicated several times (i am not interested in the attributes..even if they are different for the same geometry, I want to delete them and keep only one)

Is this possible? 

Best answer by kathyross

If a single feature has duplicate polygon parts within it, use the Deaggregator to separate the individual polygon components into separate features.

 

 

If multiple features have the exact geometry, use the Matcher to keep only unique polygons.

 

 

If the Matcher isn't deleting Duplicates, try the CoordinateRounder to round the coordinates first. Using the Leniant Matching parameter may also help.
View original
Did this help you find an answer to your question?
This post is closed to further activity.
It may be a question with a best answer, an implemented idea, or just a post needing no comment.
If you have a follow-up or related question, please post a new question or idea.
If there is a genuine update to be made, please contact us and request that the post is reopened.

1 reply

Forum|alt.badge.img+4
  • Best Answer
  • April 2, 2013
If a single feature has duplicate polygon parts within it, use the Deaggregator to separate the individual polygon components into separate features.

 

 

If multiple features have the exact geometry, use the Matcher to keep only unique polygons.

 

 

If the Matcher isn't deleting Duplicates, try the CoordinateRounder to round the coordinates first. Using the Leniant Matching parameter may also help.

Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings