Mavik 3E Aerial + Trimble X7 Leads to "assertion" error

[harrytwomey]

Hello All

We do Aerial Surveys and Building Scanning. We have also wanted to try and use the two datasets to create Models for clients but never had any success with the earlier versions, but this week upgraded to 2.0 which looks like it has a simpler workflow

I Imported some Mavik 3E Aerial photos and a few E57 Laser scans around the Elevation of our Building. Follow the few steps and Align the Photos, Put the scan in the group and set them to fixed as they are already georeferenced, and I get 2 different errors. If I generate a dense cloud from the photos and try making the Mesh from a limited area, by classifying an area of interest as building and trying to make a mesh from the point cloud, I get an Image out of Bounds error instantly, If I try and make the mesh out of the depth map and laser scans, it runs maybe halfway and gives the error "assertion failed at line 1123". If I remove the Laser scans from the project it works as expected.
So my Laser scans are causing the problem or Metashape cant handle my scans

The laser scan is captured with a Trimble X7 and georeferenced in Trimble Realworks and Exported as E57
Does anyone see a flaw in my workflow??
Does it matter that our scans are only intensity shaded with no colour or picture?

Can any who has and X7 and Drone tell me how they do it?

Thanks in advance

[Alexey Pasumansky]

Hello harrytwomey,

Can you please share the log related to the failed processing operation?

And please specify, what coordinate systems are selected for the chunk and in what system the laser scans have been imported in (you can check it in Show Info dialog for the laser scans in the Workspace pane)?

[harrytwomey]

Hello Alexey Pasumansky

Many thanks for the Speedy Response. I have recreated the assertion errors.

EPSG:2157 in the coordinate system of the Laser Scan
We have a Custom Undulation grid for the Datum in Metashape, that gives very accurate transformations and is consistent with the OSI Tool for the country(Republic of Ireland).

I've tied it in standard wgs84 also, import the scan as itm and the info shows wsg84, but I still get the assertion error

I did retry again by setting each Laserscan Position as Locked Transformed, but I still get the assertion error

[Alexey Pasumansky]

Hello harrytwomey,

If the issue is reproducible on certain laser scan file, can you please share such example to support@agisoft.com, so that we can analyze the issue on our side?

[harrytwomey]

Just an update to those who wish to know, After an update to version 2.0.1

I still have a quality issue with models generated from both depthmaps and scans, if someone could direct me to a good tutorial.

Also I have a question..if the laser scans are at scale factor 1, but the coordinate system(drone flight) is scale factor 0.99982, what is the best way to consolidate that data?