# 2D streamline with vti look strange
**URL:** https://discourse.paraview.org/t/2d-streamline-with-vti-look-strange/9891
**Category:** ParaView Support
**Created:** [June 23, 2022, 7:25am UTC](https://discourse.paraview.org/t/2d-streamline-with-vti-look-strange/9891 "2022-06-23T07:25:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@sopoyoon](https://discourse.paraview.org/u/sopoyoon)
#### Post date: [June 23, 2022, 7:25am UTC](https://discourse.paraview.org/t/2d-streamline-with-vti-look-strange/9891/1 "2022-06-23T07:25:29Z")
Hi, every one!
I am a beginner to Paraview.
Could someone help me to visualize the data please?
I have vti files where 2D velocity data also in.
[level\_400.vti](https://discourse.paraview.org/uploads/short-url/vmk8ZnqjF2bmgL4G1V6iaJgs8yw.vti) (770.3 KB)
It works well that changes of velocity and voriticy can see obviously. But when I plot the velocity streamline using `Stream Tracer`, it looks really odd:
Could someone hlep me some hints to get meaningful streamline around the object?
Thank you so much!
Sopo.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 23, 2022, 7:51am UTC](https://discourse.paraview.org/t/2d-streamline-with-vti-look-strange/9891/2 "2022-06-23T07:51:32Z")
Looks like an issue with 2D image data. Just add a “AppendDataSet” filter that will convert to unstructured grid before your stream tracer.
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### Author:  [@sopoyoon](https://discourse.paraview.org/u/sopoyoon)
#### Post date: [June 23, 2022, 8:01am UTC](https://discourse.paraview.org/t/2d-streamline-with-vti-look-strange/9891/3 "2022-06-23T08:01:40Z")
It works well. Thank you so much 😀 😀