# Geolocation Details in Quality Report

**URL:** <https://community.pix4d.com/t/geolocation-details-in-quality-report/14202>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [August 18, 2020, 3:35pm UTC](https://community.pix4d.com/t/geolocation-details-in-quality-report/14202 "2020-08-18T15:35:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sreeves](https://avatars.discourse-cdn.com/v4/letter/s/f0a364/32.png) [@sreeves](https://community.pix4d.com/u/sreeves)\
**Post date:** [August 18, 2020, 3:35pm UTC](https://community.pix4d.com/t/geolocation-details-in-quality-report/14202/1 "2020-08-18T15:35:17Z")

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Using GCPs as check points in pix4d project. Reviewing Quality Report in the Geolocation Details shows one GCP has Error Z (ft) of -1.567 feet. Other GCPs for the project show Error Z values of -0.282 (ft) and 0.146 (ft).

Looking at point cloud we see a variances around 0.3 (ft) inside of a radius of 11 (ft) from the GCP in question.

Just wondering how point cloud and GCP elevations can be so close, but the Error Z in the Quality Report can be so high.

Thanks

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**Author:** ![Christina](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/christina/32/303_2.png) [@Christina](https://community.pix4d.com/u/Christina)\
**Post date:** [August 19, 2020, 11:30am UTC](https://community.pix4d.com/t/geolocation-details-in-quality-report/14202/2 "2020-08-19T11:30:55Z")

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Hello and welcome to our Community!

Could you please upload the quality report so that we can better understand the case? To upload it, click this button when creating your community post:

![upload](https://global.discourse-cdn.com/pix4d/original/2X/e/ef2522223ca66b68bf348165ef65785db8a014b9.png)

Could you also upload a screenshot of the rayCloud that highlights the case _“we see a variances around 0.3 (ft) inside of a radius of 11 (ft) from the GCP”_?

Thank you!