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Messages - Dieter

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1
General / Re: Heights in agisoft viewer
« on: April 27, 2021, 04:38:04 PM »
Is there a full description of this viewer anywhere?


Dieter

2
General / Heights in agisoft viewer
« on: April 14, 2021, 11:44:07 AM »
A question about the Agisoft viewer.

I have created a project with my own height system. It is the UTM coordinate system with DHHN2016 heights for Germany. When I output this project as a tiled model, the ellipsoid heights appear in the viewer, my DHHN2016 heights are gone. Is that what you intended?

And if so, how can I then output the project with the correct heights for me and the client in the DHHN2016 format?



Dieter

3
General / Re: Generated model from laser data (dense cloud) is broken
« on: April 13, 2021, 12:26:39 PM »
How many digits do your coordinates have before the decimal point?

If there are more than 4, you have to shorten these to 4 digits.


Dieter

4
General / Re: Import Laserscan data -registration lost
« on: April 07, 2021, 10:57:47 AM »
I found my mistake  >:(

In one of the projects, the reference settings were set instead of Yaw, Nick, Roll -> Alpha, Nu, Kappa before merging.

I have no idea how that got there.

What the heck, thank you very much for your help, now it seems to be working.

Dieter

5
General / Re: Import Laserscan data -registration lost
« on: April 07, 2021, 09:47:53 AM »
Hello Paul,

how can I see your displayed values ​​on the screen? What do I have to enter / set?


I have now found out the following:

Project 1: Georeferencing was done via GCP. The scans match the coordinates.

Project 2:
Georeferencing was carried out using drone flights and GPS. The scans match the coordinates.

Merge project 1 and 2. The images and coordinates match, all control points from GCP and image coordinates match. The scans do NOT match the coordinates and are twisted.

Dieter

6
General / Re: Import Laserscan data -registration lost
« on: April 06, 2021, 06:41:05 PM »

Unfortunately I have to find out that none of the scripts work properly. I have now tested "quick_layout_normalize_tls.py" from Alexey and the two scripts from Paulo. In doing so, I have already read coordinate-oriented scans into an existing project with photos. Then I tried all the scripts with the following result:

The rotation of the scans is incorrect. If I tap existing points from the photos in the scans, I have deviations of several meters.

The problem must be manageable somehow.

Unfortunately, I don't have enough matches between scans and photos to really align the scans with them.

I urgently ask for help here, otherwise my project will be invalid and I will have to go to the field service again to complete the scans.

Of course I want to prevent that.

Dieter

7
General / Re: Import Laserscan data -registration lost
« on: March 28, 2021, 05:20:31 PM »
I've lost track of the scripts a little now.

Is there now a final script to download in which the error Paulo mentioned in the last post does not appear?

Dieter

8
General / Re: Import Laserscan data -registration lost
« on: March 23, 2021, 06:58:45 PM »
Well, that was just easy again ;)

 ::)

9
General / Re: Import Laserscan data -registration lost
« on: March 23, 2021, 06:17:07 PM »
I am at a loss.

I downloaded the original project again and referenced the photos. Then I loaded the scan and then ran the script.

Look for the coordinates of the photos and scan, there are no deviations or almost zero.

After that I calculated the mesh and the result is shown below. There are two completely separate walls to the hole in the castle.

I'm afraid we won't follow the same steps.

10
General / Re: Import Laserscan data -registration lost
« on: March 23, 2021, 04:36:22 PM »
Please follow the steps from this manual (freshdesk) with my Original Project.

"In case the laser scanning locations are considered as precise and you would like to avoid image matching procedure between the TLS data and digital images, it is possible to apply the exterior orientation data from the Reference pane to the loaded laser scanning data using the following script:

https://github.com/agisoft-llc/metashape-scripts/blob/master/src/quick_layout.py

If the project contains also the common digital images to be aligned, it is recommended to align such image set first and then load the TLS data to the same chunk and run the mentioned script. Note that the digital images alignment should be referenced in the same coordinate space as laser scanning data in order to be properly processed together."


You will see, that it is NOT working. I've tried this several times, there is no chance to get this working. After you import the scandata (same coordiate System as fotos), run the script and then build mesh, you will see holes and fracments in the mesh. The coordinates are NOT matching. Paulo tried this too, there is no exact matching between the fotos and the scans.


11
General / Re: Import Laserscan data -registration lost
« on: March 23, 2021, 02:52:19 PM »
I don't think that's the reason.

When I import laser scans, I have to align at least one scan with markings to the photos, otherwise the systems are not correct and I get incorrect coordinates. I've tried hundreds of ways now and that's the only way. I can't say why that is either, but it is.

That is why the old script also brings the right results, because the scans are aligned with the photos there. The new script does not create a connection between the photos and the scans. And then it just doesn't work.

Although the coordinates match, there is in some way no connection between the photos and the scans.

12
General / Re: Import Laserscan data -registration lost
« on: March 23, 2021, 10:07:34 AM »
Yes, that is the solution. I did NOT use this script because I also scanned inside the castle, so I don't have any tie-points with the photos.

I have now found the following solution for the moment: I take a scan that has enough tie points with photos and align it with the photos. Then I calculate an update of the project with fixed GPS coordinates AND fixed scan coordinates of this individual scan.

Then I can read in the remaining scans and all the coordinate transformations match up to the cm.

It would be nice if the developers offered a simpler solution here in the future. It is also desirable if these external scripts were built into the fixed code of Metashape, then all users would have the same software version and would prevent any irritation.

Thank you for your help, Paulo


Dieter

13
General / Re: Import Laserscan data -registration lost
« on: March 23, 2021, 12:48:38 AM »
What Version of Metashape you are using? Tomorrow i will try a reinstall of the Software.

My heights are German DHDN2016 heights, not ellipsod heights, they are 48 meters lower then the elipsoid heights.  But thats not the problem, really i dont understand what the problem is ?! Why is it running correct on your Side?

Thanks
Dieter

14
General / Re: Import Laserscan data -registration lost
« on: March 22, 2021, 08:22:54 PM »
I have completely different ruler coordinates than you, that's why my big deviations.

Have you tried that in my original project? So without changing the coordinate system or recalculating.
How are your deviations there?

Thank you for your help....


15
General / Re: Import Laserscan data -registration lost
« on: March 22, 2021, 07:03:57 PM »
Take a look at my coordinates from the ruler, i don't understand this.

Why do you changed my coordinate System?

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