Pix4D survey showing Unknown Error while trying to import .las file

PIX4Dsurvey PIX4Dsurvey Questions/Troubleshooting
1

I am trying to import a “las” file but I got the following Error:
Analyzing 1 LAS file…
Unknown Error: Unknown Error

I am not sure why the error shows up and it comes without any further explanation. I have tried to import this LAS file into pix4D cloud and it works.

2

Hi @kaho,

Welcome to the Pix4D Community :handshake:.

I’m sorry to hear that you are having issues during the import of the .las file into PIX4Dsurvey.

Can you please tell me how you generated the .las file?

Cheers,
Daniele

3

Nice to hear from you!!
So my .las file is generated from a vehicle mapping system including LiDAR, GNSS and cameras. I tried to put this las file onto Pix4D cloud and it works, but it is not the case in Pix4D survey.
I checked my las file version to be 1.4.

4

Hi @kaho,

I see you are also in contact with a colleague of mine (Yuka).

It seems that the problem lies in the fact that the point cloud is in a geocentric Coordinate Reference System (CRS). This is not yet supported in PIX4Dsurvey.

Please export your .las file using a projected CRS.

You can open a PIX4Dsurvey feature request thread requesting for support for geocentric CRS.

Cheers,
Daniele

5

I created las file using another program for processing drone data. A couple of days ago everything worked fine. I inserted las file without problems. Now it doesn’t work. I installed the new version 1.54.1 but I still get the unknown error notification.

6

Hi @lucija.lisjak,

Thank you for your message.

Are you referring to the same .las that worked previously and you can’t import it anymore using PIX4Dsurvey 1.54.1?

7

Found the solution but I don’t know why I have to do that now.
I’m from Croatia. I work with HTRS96 (horizontal) and HVRS71 (vertical) CRS. Couple of days ago when I wanted to import my las file I selected known CRS. But now it doesn’t work. I have to select Arbitrary CRS and then it imports.
Tried to import the same las every time…

8

Hi @lucija.lisjak.

Thank you for the additional information.

It seems that HTRS96 is also geocentric, and therefore not supported in PIX4Dsurvey yet.

You can open a PIX4Dsurvey feature request thread requesting for support for geocentric CRS.

Kind regards,
Daniele