# Cell Data to Point Data question

**URL:** https://discourse.paraview.org/t/cell-data-to-point-data-question/17722
**Category:** ParaView Support
**Tags:** vtk
**Created:** [September 12, 2026, 6:03am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722 "2026-09-12T06:03:32Z")
**Posts on this page:** 7
**Page:** 1

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### Author: ![Joao\_Pedro\_Perdigao](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/51bf81/32.png) [@Joao\_Pedro\_Perdigao](https://discourse.paraview.org/u/Joao_Pedro_Perdigao)
#### Post date: [September 12, 2026, 6:03am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/1 "2026-09-12T06:03:32Z")

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Hello,

I’m applying a “Cell Data to Point Data” filter to my wind tunnel data and when checking the Ranges of the data arrays I realized that the ranges (maximum and minimum values) of the Point Data differ quite a bit from the Cell Data.

I’m finding this a bit strange since there should be several cells with similar values around the max and min, so that the average (of converting the cell data to point data) should be much closer than it is. Here are some of the ranges:

 ![image](https://discourse.paraview.org/uploads/default/original/3X/c/b/cb594e3ceae4ca6cf49d32a29b2d0322458d04de.png)

 ![image](https://discourse.paraview.org/uploads/default/original/3X/5/0/50f0ec5a2867f309a7e52d2149e6e7e6dbf37c4a.png)

If anyone need the data to have a look, I can share it.

Best regards and thank you in advance,  
João Perdigão

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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: [September 16, 2026, 11:50am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/2 "2026-09-16T11:50:52Z")

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Please share your data and steps to repro

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### Author: ![otaolafr](https://discourse.paraview.org/user_avatar/discourse.paraview.org/otaolafr/32/3595_2.png) [@otaolafr](https://discourse.paraview.org/u/otaolafr)
#### Post date: [September 16, 2026, 12:16pm UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/3 "2026-09-16T12:16:01Z")

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hello mathieu,  
a simple waveleght + point data to cell data + cell data to point data (with pass cell data on) reproduces what he mentioned.

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### Author: ![Joao\_Pedro\_Perdigao](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/51bf81/32.png) [@Joao\_Pedro\_Perdigao](https://discourse.paraview.org/u/Joao_Pedro_Perdigao)
#### Post date: [September 17, 2026, 5:13am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/4 "2026-09-17T05:13:18Z")

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Hello Mathieu,

Here is one example of the data I’m using: [Unique Download Link | WeTransfer](https://we.tl/t-F89f74VhXOn7k1a1)

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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: [September 17, 2026, 7:27am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/5 "2026-09-17T07:27:26Z")

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I dont see anything special, the range are reduced when you run CellDataToPointData because of the interpolation that takes place.

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### Author: ![piedycat](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/p/35a633/32.png) [@piedycat](https://discourse.paraview.org/u/piedycat)
#### Post date: [September 17, 2026, 9:56pm UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/6 "2026-09-17T21:56:24Z")

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What is the interpolation method, simple average, area weighted or inverse distance squared of neighbouring elements ?

Regards Mark

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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: [September 18, 2026, 8:08am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722/7 "2026-09-18T08:08:02Z")

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> **[VTK: vtkCellDataToPointData Class Reference](https://vtk.org/doc/nightly/html/classvtkCellDataToPointData.html)**

Simple average