# POINT CLOUD SHIFT

**URL:** <https://community.pix4d.com/t/point-cloud-shift/18416>\
**Category:** PIX4Dmapper\
**Created:** [June 7, 2021, 6:57pm UTC](https://community.pix4d.com/t/point-cloud-shift/18416 "2021-06-07T18:57:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![gshepherd](https://avatars.discourse-cdn.com/v4/letter/g/e9bcb4/32.png) [@gshepherd](https://community.pix4d.com/u/gshepherd)\
**Post date:** [June 7, 2021, 6:57pm UTC](https://community.pix4d.com/t/point-cloud-shift/18416/1 "2021-06-07T18:57:44Z")

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On a road surface the point cloud shifts up for about 20’ then back down to correct level. Can you help fix this problem? See attached screen clip.

 ![CLOUD SHIFT.PNG](https://global.discourse-cdn.com/pix4d/original/2X/7/701047513b652c76e1632d8c1c05b0f91847c68d.jpeg)

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**Author:** ![Yuka](https://avatars.discourse-cdn.com/v4/letter/y/9d8465/32.png) [@Yuka](https://community.pix4d.com/u/Yuka)\
**Post date:** [June 8, 2021, 6:15am UTC](https://community.pix4d.com/t/point-cloud-shift/18416/2 "2021-06-08T06:15:12Z")

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Would you please upload the quality report to see if there are any issues with processing?

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**Author:** ![gshepherd](https://avatars.discourse-cdn.com/v4/letter/g/e9bcb4/32.png) [@gshepherd](https://community.pix4d.com/u/gshepherd)\
**Post date:** [June 9, 2021, 3:36pm UTC](https://community.pix4d.com/t/point-cloud-shift/18416/3 "2021-06-09T15:36:00Z")

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[MAHRT NAD27 GA W 2020\_report.pdf](https://community.pix4d.com/uploads/short-url/bLor6xbdiHVNqlzafvAStwDgr7K.pdf) (2.0 MB)  
Here you go. Thanks for the help.

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**Author:** ![Yuka](https://avatars.discourse-cdn.com/v4/letter/y/9d8465/32.png) [@Yuka](https://community.pix4d.com/u/Yuka)\
**Post date:** [June 10, 2021, 1:48pm UTC](https://community.pix4d.com/t/point-cloud-shift/18416/4 "2021-06-10T13:48:19Z")

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Thank you for uploading the quality report. I recommend adding MTPs to the problematic areas and marking more GCPs on more images. For more information on how to add MTPs, please refer to the link below.

> **[How to add / import and mark manual tie points (MTPs) in the rayCloud](https://support.pix4d.com/hc/en-us/articles/202560349-How-to-add-import-and-mark-manual-tie-points-MTPs-in-the-rayCloud)**
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> Video: Watch the instructional video about manual tie points:
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> An automatic tie point (ATP) is a 3D point corresponding to a keypoint that is automatically detected and matched in the images.A...

Kind regards,