# Remove vertices not used in unstructured grid

**URL:** https://discourse.paraview.org/t/remove-vertices-not-used-in-unstructured-grid/11175
**Category:** ParaView Support
**Created:** [January 16, 2023, 11:30am UTC](https://discourse.paraview.org/t/remove-vertices-not-used-in-unstructured-grid/11175 "2023-01-16T11:30:14Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Juan\_Jose\_Casafranca](https://discourse.paraview.org/user_avatar/discourse.paraview.org/juan_jose_casafranca/32/3499_2.png) [@Juan\_Jose\_Casafranca](https://discourse.paraview.org/u/Juan_Jose_Casafranca)
#### Post date: [January 16, 2023, 11:30am UTC](https://discourse.paraview.org/t/remove-vertices-not-used-in-unstructured-grid/11175/1 "2023-01-16T11:30:14Z")

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I have a vtkUnstructuredGrid which has vertices not referenced by any cell. This happens because I have a big list of points which are used in several vtkUnstructedGrid. Each grid has cells that reference only a subset of the points.

Is there any filter to remove vertices and vertex data not referenced by any cell on the grid?

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 17, 2023, 9:18am UTC](https://discourse.paraview.org/t/remove-vertices-not-used-in-unstructured-grid/11175/2 "2023-01-17T09:18:21Z")

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Yes ! Use CleanToGrid filter with “RemovePoitnsWithoutCells” property to on. This is only available in master or nightly though, not in any release yet.