Attribute: Vertical length
Attribute type: F
The total vertical length of an object.
INT 1: IE 5; IL 21.3;
Minimum Value: 0
Unit: defined in the HUNI subfield of the DSPM record or in the HUNITS attribute of the M_UNIT meta object class, e.g. metre (m)
Resolution: 0.1 m or 0.1 ft
24.5 for a vertical length of 24.5 metres.
For floating objects: the vertical distance from the surface of water to the highest point of that object.
For fixed objects: the vertical distance from seabed or ground to the highest point of that object.
For objects on top of other objects: the vertical distance from the lowest to the highest point of that object.
Vertical length measurements do not require a datum.