Deleting polygons which have the same coordinates (duplicates)

Question

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?

kathyross · Accepted Answer

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.

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