The classes are completely defined by the values in the following metadata dimensions. Each of these dimensions may explain any differences VAIDR will find in the image data unless it is selected as the grouping criterion (see below).
VAIDR will group wells by these
conditions: VESSEL.
This will ensure that the effects that are found are robust across
groups with different values for that dimension.
The current grouping results in 12 groups with 6 wells per group.