M3C2-Coordinate System

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M3C2-Coordinate System

Postby mlc183 » Wed Sep 13, 2017 10:43 pm

Thanks for developing such a useful software and for answering questions!
I am using M3C2 to difference point clouds of a river gravel bar at two different times. My point clouds have a real coordinate system (NAD83 Oregon North International ft). When I import them into CC I allow the program to adjust itself to local coordinates. Then I align the two clouds using the equivalent point pair method. Then I run M3C2. The results of M3C2 shows the change between the two clouds and produces a histogram with values, which I can then see on the color bar next to my model. My questions are:
1) What are the units on the color bar (the units of change that are being reported)?
2) Are those units reflective of the coordinate system even though I allowed the program to transfer to local coordinates?

For example: If the change reported is 0.10. Then is that equivalent to 0.10 ft?

Thank you for your time!

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Re: M3C2-Coordinate System

Postby daniel » Thu Sep 14, 2017 5:26 am

Yes, the original units are always preserved. The Global Shift or the registration process don't change them. So it should be feets indeed.
Daniel, CloudCompare admin

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