# VTK Dataset creation from custom data

**URL:** https://discourse.paraview.org/t/vtk-dataset-creation-from-custom-data/14925
**Category:** Development
**Created:** [June 26, 2024, 7:25am UTC](https://discourse.paraview.org/t/vtk-dataset-creation-from-custom-data/14925 "2024-06-26T07:25:15Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![joint](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/dc4da7/32.png) [@joint](https://discourse.paraview.org/u/joint)
#### Post date: [June 26, 2024, 7:25am UTC](https://discourse.paraview.org/t/vtk-dataset-creation-from-custom-data/14925/1 "2024-06-26T07:25:15Z")

</div>

Hello, dear Mathieu!

I have custom data in my own specific data format, and I want to convert it to VTK Dataset format. I know that original data was a mesh of hexahedrons, however my custom data format foes not contain topology data.

Is there a way to get the cells formed (the topology) given only the geometry?

I would be very much grateful for any support

Thanks,  
Mike

---

<div class="post-metadata">

### 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: [June 26, 2024, 7:29am UTC](https://discourse.paraview.org/t/vtk-dataset-creation-from-custom-data/14925/2 "2024-06-26T07:29:06Z")

</div>

This is more of a question for [https://discourse.vtk.org/](https://discourse.vtk.org/), in any case, you can read the documentation for vtkUnstructuredGrid here: [VTK: vtkUnstructuredGrid Class Reference](https://vtk.org/doc/nightly/html/classvtkUnstructuredGrid.html)