Improve area selection used for 3D-scanning (point cloud creation)

[GNSS-Stylist]

Currently area used for 3D-scanning/point cloud creation is limited by a bounding sphere defined in NED-coordinates/radius by hand when post-processing. Especially for bigger objects (like buildings) this is cumbersome.

For example, limiting area (or volume) could also be defined as:

• 3D convex hull around the object, tags (=timestamps) used to define points.
• 2D convex hull (in NE-plane) around the object, tags (=timestamps) used to the define points, height being either infinite or definable by user. This could be used with objects like buildings when user is unable to set 3D-points high enough.

It should be figured out how this could be improved and then implemented.