# Reprojection error

**URL:** <https://community.pix4d.com/t/reprojection-error/32915>\
**Category:** PIX4Dmatic\
**Created:** [February 25, 2025, 10:01am UTC](https://community.pix4d.com/t/reprojection-error/32915 "2025-02-25T10:01:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jack.zhang](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jack.zhang](https://community.pix4d.com/u/jack.zhang)\
**Post date:** [February 25, 2025, 10:01am UTC](https://community.pix4d.com/t/reprojection-error/32915/1 "2025-02-25T10:01:15Z")

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How can I find the mean reprojection error in the quality report of Pix4D Matic after I finish the AT task.

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**Author:** ![Rhea\_Garratt](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/rhea_garratt/32/403_2.png) [@Rhea\_Garratt](https://community.pix4d.com/u/Rhea_Garratt)\
**Post date:** [February 28, 2025, 6:22am UTC](https://community.pix4d.com/t/reprojection-error/32915/2 "2025-02-28T06:22:36Z")

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Hi @jack.zhang you can find the reprojection error for all marked tie points in the _Tie points_ table in the quality report. See an example of the ground control points table in the screenshot below, and the quality report will display a similar table for checkpoints and manual tie points if you have any in your project. Cheers

 ![image](https://global.discourse-cdn.com/pix4d/original/2X/3/3a746f0971f13155c7720ae73892460b0800be3a.png)