CloudCompare forum

Hi Daniel,

I would like to kindly ask for your help.

I have two point clouds that were recorded within an hour of each other. I need to calculate the amount of displacement that occurred in the x, y, and z coordinate between the scans. My research question is whether or not the rates of ...

Hi Daniel,

Thank you once again for all your answers, and your patience. New question,

Q. Is it possible to draw a polygon onto the point cloud and save the polygon coordinates as a txt file?

I know it's possible to do this with point labels, but does it work in the same way for polygons?

In ...

Hi again Daniel,

When I draw a polygon on to the point cloud, it preserves the x,y,z coordinates of the 'bounding box' - but this does not give me the true volume of the object inside the bounding box. The ice bergs are irregularly shaped, but the bounding box is a cuboid. Is there any way to ...

Hi Daniel,

Thanks for your answer. I appreciate your help. I have a new question, very important.

I would like to know how to calculate the numerical difference (i.e., what was the amount of change that took place in terms of volume loss meters cubed) when I compare two point clouds?

When I ...

So I hope you see

1. i have a point cloud registered in UTM coordinates (eastings, northings)

2. I have digital photographs of glacier

3. I want to calculate the size of the ice inside the polygons to create categories eg. small, medium, large

4. questions - what software to draw the polygons ...

Hi Daniel,

Thanks for your answer.

I'll try to explain in more detail my project.

I have digital photographs of a glacier (see photo attached). I took the photos using a camera. Positioned next to the camera my Professor had the laser scanner. So, I want to use the point cloud to determine the x ...

Hi Daniel,

Thank you for your answer. I have a new question:

Does Cloud Compare allow you to view digital photographs, and draw polygons onto digital photographs?

Ricky

Also - is it possible to export the points (you seen them above in the colour pink) as a shape file?

If the answer is yes, I could then import the shape file into ArcGIS.

Also, I am running mac 10.6.8

do you have the link so I can upgrade / download to 2.5.4 version cloud compare? I believe this is the latest version my 64 bit machine can support.

Hi Daniel,

Thank you for your message. I have attached a screen shot image of the point cloud I am using. You will see there are some pink coloured points - these are the points I have manually added on top of the point cloud. I did this by clicking on "point picking", and then clicking on a point ...