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Cloud Point showing up as a straight line
Posted: Fri Apr 19, 2024 8:07 pm
by LiDoom
Hello,
For some reason when loading this point cloud file it shows up as a straight line, I can zoom in and out, but I don't see the full extent of the cloud.
Re: Cloud Point showing up as a straight line
Posted: Sat Apr 20, 2024 8:08 pm
by PierreGEOSCAN3D
Hello, I'm not exactly sure what type of files you are using, but to give you a hint, I have encountered this type of issue before with files where the X, Y, and Z columns were not properly aligned. Make sure that the XYZ coordinates are correctly pointing to the appropriate columns in the table.
Re: Cloud Point showing up as a straight line
Posted: Sat Apr 20, 2024 8:37 pm
by DA523
check xyz order during import
Re: Cloud Point showing up as a straight line
Posted: Mon Apr 22, 2024 12:23 pm
by daniel
Also, a classical issue is if the points are expressed in a 'geographical' coordinate system with X and Y being angles, and Z being in meters (i.e. with a totally different scale). CC expects all 3 dimensions to be the same.
Re: Cloud Point showing up as a straight line
Posted: Sun Apr 28, 2024 2:40 am
by LiDoom
daniel wrote: ↑Mon Apr 22, 2024 12:23 pm
Also, a classical issue is if the points are expressed in a 'geographical' coordinate system with X and Y being angles, and Z being in meters (i.e. with a totally different scale). CC expects all 3 dimensions to be the same.
Thank you. How can I check or edit this upon import?
Re: Cloud Point showing up as a straight line
Posted: Sun Apr 28, 2024 7:19 pm
by LiDoom
PierreGEOSCAN3D wrote: ↑Sat Apr 20, 2024 8:08 pm
Hello, I'm not exactly sure what type of files you are using, but to give you a hint, I have encountered this type of issue before with files where the X, Y, and Z columns were not properly aligned. Make sure that the XYZ coordinates are correctly pointing to the appropriate columns in the table.
This is a Mavik drone scan processed in MetaShape and extracted as a point cloud file.
Re: Cloud Point showing up as a straight line
Posted: Sun Apr 28, 2024 7:46 pm
by HeadLess
Make sure that you are using global shift during opening, if cc revommends it. It might be caused by large coordinate precision loss.
Re: Cloud Point showing up as a straight line
Posted: Sun Apr 28, 2024 7:51 pm
by daniel
LiDoom wrote: ↑Sun Apr 28, 2024 2:40 am
daniel wrote: ↑Mon Apr 22, 2024 12:23 pm
Also, a classical issue is if the points are expressed in a 'geographical' coordinate system with X and Y being angles, and Z being in meters (i.e. with a totally different scale). CC expects all 3 dimensions to be the same.
Thank you. How can I check or edit this upon import?
You'll see that right away by considering the scale/values in the X, Y and Z columns (angular values will be much smaller, and almost all the same)
Re: Cloud Point showing up as a straight line
Posted: Mon Apr 29, 2024 10:34 pm
by LiDoom
HeadLess wrote: ↑Sun Apr 28, 2024 7:46 pm
Make sure that you are using global shift during opening, if cc revommends it. It might be caused by large coordinate precision loss.
here's what I see when importing. For some reason I don't have an issue when opening up this point cloud in Quick Terrain Modeler.
Re: Cloud Point showing up as a straight line
Posted: Wed May 01, 2024 3:50 pm
by daniel
And what the bounding-box looks like once you've loaded the cloud?
There's good chances that Quick Terrain Modeler does manage properly geographic coordinate systems...