3Dsurvey

3Dsurvey => General Discussion => Topic started by: mark.west on May 07, 2022, 07:28:08 PM

Title: Difference in surface model.
Post by: mark.west on May 07, 2022, 07:28:08 PM

Hi, I shot a surface with about 15 GCPs. When I made a point cloud I realized, that in one area there seems to be a difference of about a foot when it should be about 3/10's of a foot. What should I do?

Title: Re: Difference in surface model.
Post by: mark.west on May 07, 2022, 07:31:17 PM

Hi,
The best method would be to incorporate the GCPs using the "Orientate with GCPs" function, then recalculate your point cloud.

Another option is also to right-click on the point cloud and select "transform":
(https://forum.3dsurvey.si/index.php?action=dlattach;topic=88.0;attach=199)
Then the point cloud can be moved for example for 0.3' in the vertical direction:
(https://forum.3dsurvey.si/index.php?action=dlattach;topic=88.0;attach=201)
In version 2.16, a function is coming that will allow calculating 7 parameter transformations between sets of points to fill in the values for this transform tool from the asci file.