# Extract subset from unstructured dataset into spatial uniform grid

**URL:** https://discourse.paraview.org/t/extract-subset-from-unstructured-dataset-into-spatial-uniform-grid/10899
**Category:** ParaView Support
**Created:** [December 2, 2022, 7:24am UTC](https://discourse.paraview.org/t/extract-subset-from-unstructured-dataset-into-spatial-uniform-grid/10899 "2022-12-02T07:24:53Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![catiocean](https://discourse.paraview.org/user_avatar/discourse.paraview.org/catiocean/32/11663_2.png) [@catiocean](https://discourse.paraview.org/u/catiocean)
#### Post date: [December 2, 2022, 7:24am UTC](https://discourse.paraview.org/t/extract-subset-from-unstructured-dataset-into-spatial-uniform-grid/10899/1 "2022-12-02T07:24:53Z")

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Hello,

My question is about how to create a spatially evenly distributed (approximately) vector field from unstructured grid.

I am working on generating tidal current velocity field in a coastal area using Glyph. However, my grid density is super spatially heterogeneous that the grid in some area is very dense. Also, I only would like to plot vector in certain area (e.g. not including the river channel part in the north). I wonder if there is any way in Paraview to extract/plot the vector into spatially uniform field (maybe from pre-selected grid or other method)? Any help will be greatly appreciated. Thank you!

I am using Paraview 5.10.1 on Windows 11 machine.

 ![Capture](https://discourse.paraview.org/uploads/default/original/2X/e/e80182880795404cc902befcabe7bdfc735785e7.png)  
 ![Capture2](https://discourse.paraview.org/uploads/default/original/2X/1/12b04bee2a214fccfa9f8c154b1979a36f9d1d30.png)