altitudeMode

How the cloud's Z is interpreted. AltitudeMode.ABOVE_SEA_LEVEL (default) treats it as orthometric height — how nearly all LiDAR ships — and adds the geoid offset so it shares the globe's datum and rests on terrain (terrain is elevation + geoid.getOffset; a raw orthometric Z would float by the geoid separation). AltitudeMode.ABSOLUTE treats Z as already-ellipsoidal. Ground-relative modes don't apply — a cloud's coordinates are absolute.