Normally, a label is always facing the viewer. This property lets the client change this by making the label face in a specific direction or to lie on the terrain surface
Possible values:
sgLabelLockModeDecal – label is always facing the viewer
sgLabelLockModeAxis - label is locked on its axis according to the label yaw
sgLabelLockModeAxisTextUp -
sgLabelLockModeAxisAutoPitch -
sgLabelLockModeAxisAutoPitchTextUp -