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Recap Coordination System problem

Darkselby
Community Visitor
Community Visitor

Recap Coordination System problem

Darkselby
Community Visitor
Community Visitor

Hi, i have a small problem.

The thing is about, I do some surveying project in Switzerland and i takes some pictures from the drone to use it for ortophoto ans some 3d models (this is my firs project like this, just learning that right now). To calculate all of that things i used Agisoft Metashape, and here everything is fine. I want to export model that to Civil 3D, because i want to calculate something. Origina data that i got is in WGS84 (LL84) cordinate system. So to get that to Civil i just export my Dense Cloud to Recap, choose and set "coordinate system current & target" as LL84 (i tried import same dense cloud to Qgis and everything is fine there). But after a while i lunch a program and if you look at first glance, the whole thing looks ok, but what i got is model with weird coordinates, rotated axis. I just dont know what i am doing wrong. 

Sorry for my english, I hope you are understanding

 

 

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Pointdump
Mentor
Mentor

Hi Robert,
Try setting "Target" to a Projected Coordinate System.
Dave

Dave Stoll
Las Vegas, Nevada

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Maksim.Melnikov.BY
Collaborator
Collaborator

Hi @Darkselby 
Your main mistake is to work with photogrammetry data in WGS84 coordinate system (angular values).
The correct technique for doing this work involves working in a plane coordinate system (XYZ). Work in flat coordinate system starts with ground control (GCP) and coordinates of photo centers in coordinate system (XYZ).
As an exception Agisoft allows to process photogrammetry project in WGS84 coordinate system, but when exporting data to CAD (BIM) software you must transform data to coordinate system (XYZ). (For example UTM84 for your region or other). Agisoft allows you to choose a coordinate system from a list or import your own in PRJ format.
As @Pointdump  wrote you can transform the point cloud at the import stage (before indexing) in ReCap, according to this article https://knowledge.autodesk.com/support/recap/learn-explore/caas/sfdcarticles/sfdcarticles/ReCap-360-...
But it is more correct to do it at the stage of data import to Agisoft or other photogrammetric software.

 

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