Tie points disappeared

PIX4Dmapper
1

Hey all,

I am new to PIX4Dmapper. So sorry if this is very basic.

Why do I see nothing in the rayCloud view?

I added the photos. I did the initial processing. The tie points appeared. Then I clicked something in the View panel, and the tie points disappeared. And I cannot get them back. I restarted the software, and rerun the Initial processing. The layer is turned on.

2023-04-28 17_19_53-Pix4Ddiscovery - Non Commercial - 0316 alsonmedi without GCPs
2023-04-28 17_19_53-Pix4Ddiscovery - Non Commercial - 0316 alsonmedi without GCPs1278×1038 70.3 KB

2

Hi abel_rozsas,

What coordinate system is the GCPS in? Would you be able to attach the quality report for a more in-depth look?

I’ve seen this happen when the GCPs are in an arbitrary coordinate system. The GCPs will show up in a different location than your photos. You will need to mark them before they will match up together. Follow the step by step in this article: How to compute the site calibration for GCPs in an Arbitrary Coodinate System in Pix4Dmapper

3

Hello Yoko,

Thanks for your email.

It seems that I input the GCP data in the wrong coordinate system. So the photos were located in Europe and the GCPs in Africa.

Thanks for your help.

Best,
Abel

1 Like