# GCP's not affecting the tie points **URL:** \ **Category:** PIX4Dmapper Questions/Troubleshooting\ **Created:** [March 14, 2018, 8:11pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203 "2018-03-14T20:11:31Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Brandon\_Krebs](https://avatars.discourse-cdn.com/v4/letter/b/aeb1de/32.png) [@Brandon\_Krebs](https://community.pix4d.com/u/Brandon_Krebs)\ **Post date:** [March 14, 2018, 8:11pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/1 "2018-03-14T20:11:31Z")
I am having trouble with trying to get my automatic tie points to rise up to where my ground control points are. All the automatic tie points around my gcp are approximately 3 feet lower. I have marked this point in as many images as are available and reoptimized and i have done the entire initial step multiple times.    ---
**Author:** ![Jorge\_Santos](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@Jorge\_Santos](https://community.pix4d.com/u/Jorge_Santos)\ **Post date:** [March 15, 2018, 4:51pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/2 "2018-03-15T16:51:36Z")
Have you reprocess the fase1 after inserting the gcp? ---
**Author:** ![Brandon\_Krebs](https://avatars.discourse-cdn.com/v4/letter/b/aeb1de/32.png) [@Brandon\_Krebs](https://community.pix4d.com/u/Brandon_Krebs)\ **Post date:** [March 16, 2018, 1:23pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/3 "2018-03-16T13:23:40Z")
\*\*[Jorge Santos](https://community.pix4d.com/hc/en-us/profiles/1418296526-Jorge-Santos)\*\*Yesterday at 12:51 Have you reprocess the fase1 after inserting the gcp?   Yes, I have done that multiple times. The tie points in that area refuse to move. The GCP point was taken with survey equipment by our survey crew. ---
**Author:** ![Jaakko\_Laihola](https://avatars.discourse-cdn.com/v4/letter/j/f6c823/32.png) [@Jaakko\_Laihola](https://community.pix4d.com/u/Jaakko_Laihola)\ **Post date:** [March 16, 2018, 1:57pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/4 "2018-03-16T13:57:47Z")
Could you share the quality report? ---
**Author:** ![Jorge\_Santos](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@Jorge\_Santos](https://community.pix4d.com/u/Jorge_Santos)\ **Post date:** [March 16, 2018, 3:14pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/5 "2018-03-16T15:14:32Z")
Also have you tried processing the point cloud (2ยบ fase) for examing if the point clound also have that problem? ---
**Author:** ![Brandon\_Krebs](https://avatars.discourse-cdn.com/v4/letter/b/aeb1de/32.png) [@Brandon\_Krebs](https://community.pix4d.com/u/Brandon_Krebs)\ **Post date:** [March 19, 2018, 8:06pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/6 "2018-03-19T20:06:12Z")
I have also tried reprocessing the entire project and both the point cloud and 3d mesh does not match my GCP. I cant upload the entire quality report. Which pages would you need to see? ---
**Author:** ![Jaakko\_Laihola](https://avatars.discourse-cdn.com/v4/letter/j/f6c823/32.png) [@Jaakko\_Laihola](https://community.pix4d.com/u/Jaakko_Laihola)\ **Post date:** [March 20, 2018, 5:55am UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/7 "2018-03-20T05:55:20Z")
@Brandon Upload your quality raport to e.g dropbox or onedrive and share a link to it. ---
**Author:** ![Brandon\_Krebs](https://avatars.discourse-cdn.com/v4/letter/b/aeb1de/32.png) [@Brandon\_Krebs](https://community.pix4d.com/u/Brandon_Krebs)\ **Post date:** [March 20, 2018, 7:00pm UTC](https://community.pix4d.com/t/gcps-not-affecting-the-tie-points/6203/8 "2018-03-20T19:00:49Z")
[https://www.dropbox.com/s/0zqdgwrpyvdhy5y/Test%20Flight%20Meadows\_report.pdf?dl=0](https://www.dropbox.com/s/0zqdgwrpyvdhy5y/Test%20Flight%20Meadows_report.pdf?dl=0)  Here is the link to my dropbox. Let me know what you think.  I am very curious as to why this is happening.