Universal Dataset Number: 18
Name: Coordinate Systems
Record 1: FORMAT(5I10)
Field 1 -- coordinate system number
Field 2 -- coordinate system type
Field 3 -- reference coordinate system number
Field 4 -- color
Field 5 -- method of definition
= 1 - origin, +x axis, +xz plane
Record 2: FORMAT(20A2)
Field 1 -- coordinate system name
Record 3: FORMAT(1P6E13.5)
Total of 9 coordinate system definition parameters.
Fields 1-3 -- origin of new system specified in
reference system
Fields 4-6 -- point on +x axis of the new system
specified in reference system
Fields 7-9 -- point on +xz plane of the new system
specified in reference system
Records 1 thru 3 are repeated for each coordinate system in the model.