# Export distributed point from slice

**URL:** https://discourse.paraview.org/t/export-distributed-point-from-slice/15123
**Category:** ParaView Support
**Created:** [July 25, 2024, 4:44pm UTC](https://discourse.paraview.org/t/export-distributed-point-from-slice/15123 "2024-07-25T16:44:57Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![NM1293](https://discourse.paraview.org/user_avatar/discourse.paraview.org/nm1293/32/14915_2.png) [@NM1293](https://discourse.paraview.org/u/NM1293)
#### Post date: [July 25, 2024, 4:44pm UTC](https://discourse.paraview.org/t/export-distributed-point-from-slice/15123/1 "2024-07-25T16:44:57Z")

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Hello Everyone,  
I uploaded an .stp file of a blade into ParaView. My goal is to obtain a series of airfoil profiles. I accomplished this by using a slice filter. By exporting the data, I obtained a .csv file containing the x, y, and z coordinates of a series of points that make up the blade’s airfoil.

However, these points are not uniformly distributed along the airfoil, and I am unable to select a specific number of points to extract.

The attached figure and file help illustrate what I mean.

Is there a way to specify a desired number of uniformly distributed points along the airfoil?

Thank you 😀

 ![Airfoil_ex](https://discourse.paraview.org/uploads/default/original/2X/c/cfed9ea778cd336d48a28fe9e4ba179d64af4967.jpeg)  
[Airfoil\_1.csv](https://discourse.paraview.org/uploads/short-url/tL5eNSG07s0JICtHii1j68T4qBz.csv) (10.4 KB)

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### Author: ![Kenichiro-Yoshimi](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/ecc23a/32.png) [@Kenichiro-Yoshimi](https://discourse.paraview.org/u/Kenichiro-Yoshimi)
#### Post date: [July 26, 2024, 3:11am UTC](https://discourse.paraview.org/t/export-distributed-point-from-slice/15123/2 "2024-07-26T03:11:59Z")

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The most straightforward approach consists of the following steps. However, for intricate airfoils, this method may not yield optimal results.

1. Load a STEP file.
2. Use the `Plot On Intersection Curves` filter to cut the wing shape.

 ![cutting](https://discourse.paraview.org/uploads/default/original/2X/6/6e9bd56c004cba3db8fd90d499a635bce96861ef.png)  
3. Extract the desired cut line using the `Extract Block` filter. Note that the nodes forming this cut line may not be uniform, but they are sorted in order, and their arc lengths are calculated.

 ![extract_cut_line](https://discourse.paraview.org/uploads/default/original/2X/f/fe034d748722bc086838b4bae8953611f1287034.png)  
4. Apply the `Contour` filter to extract points uniformly based on the arc length.

- `Contour By`: arc\_length
- `Value Range` Table: Click the `Add a range of values` button and define the desired number of samples in the `Number of Samples`.

 ![contour_filter](https://discourse.paraview.org/uploads/default/original/2X/d/d2eb4e3d520d16aea040d7260ae7b2de4d5a3c47.png)