# Applying Vegetation Index to Magic Tool results

**URL:** <https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533>\
**Category:** Pix4Dfields Feature Request\
**Created:** [May 28, 2025, 11:19am UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533 "2025-05-28T11:19:00Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![lowaltitude](https://avatars.discourse-cdn.com/v4/letter/l/f19dbf/32.png) [@lowaltitude](https://community.pix4d.com/u/lowaltitude)\
**Post date:** [May 28, 2025, 11:19am UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533/1 "2025-05-28T11:19:00Z")

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_As a_ Drone Service Provider  
_I want to_  
Use the Magic Tool to indentify crop rows and **THEN** apply vegetation indexes to the results  
_So that_  
Only the crop canopy reflectance is measured and reported on (ie only the ‘wanted’ cells contain the VI results)

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**Author:** ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)\
**Post date:** [May 28, 2025, 2:47pm UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533/2 "2025-05-28T14:47:32Z")

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Hi Chris,

You can save the magic tool outputs as Boundaries on the last step, and use those boundaries to trim the VI.

I hope this makes sense

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**Author:** ![lowaltitude](https://avatars.discourse-cdn.com/v4/letter/l/f19dbf/32.png) [@lowaltitude](https://community.pix4d.com/u/lowaltitude)\
**Post date:** [May 28, 2025, 3:51pm UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533/3 "2025-05-28T15:51:48Z")

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Thanks Jose, I will try that!

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**Author:** ![ethant](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/ethant/32/9215_2.png) [@ethant](https://community.pix4d.com/u/ethant)\
**Post date:** [June 28, 2025, 6:54pm UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533/4 "2025-06-28T18:54:21Z")

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Hi, I’ve been reading posts about separating vine rows from the inter-rows and I don’t understand how to use the magic tool for this. I have tried but I’m doing something wrong. Do you mind explaining the work flow?

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**Author:** ![lowaltitude](https://avatars.discourse-cdn.com/v4/letter/l/f19dbf/32.png) [@lowaltitude](https://community.pix4d.com/u/lowaltitude)\
**Post date:** [June 28, 2025, 8:30pm UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533/5 "2025-06-28T20:30:42Z")

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I don’t think the tool works well for our usecase. I’ve tried several times and just can’t get decent results I’m afraid. For example, getting the cell size right is a challenge, and multiple directions of vine rows throw it.  
I’ve seen some good Python programmes that are attempting to recognise the vine row edges with AI, but they are very unusable unless you’re a dev. Not scalable for commercial use yet.

That only leaves the sub-polygons within a boundary option, which is very very time consuming, although hopefully just need to do it once! I think I found a bug in that today though, in that the ‘accept’ tick button is greyed out so I can’t actually create a simple 4 point sub polygon! I’ve reported it.

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**Author:** ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)\
**Post date:** [June 30, 2025, 7:13am UTC](https://community.pix4d.com/t/applying-vegetation-index-to-magic-tool-results/33533/6 "2025-06-30T07:13:24Z")

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Hi Chris,

We understand it is not the best workaround, but we will release a tool that you might benefit from.  
Thanks for reporting the bug!