| Description: Provides the clockwise rotation of the line and sample coordinate system with respect to the map projection origin. Note that a value of 90.0 is used for all Cassini BIDRs (basic image data record) indicating that lines of the projected image have constant oblique-system longitude and columns have constant oblique-system latitude. As stated in the Cassini BIDR SIS (software interface specification), for these images, it was convenient to represent longitude in the line direction so that the images, which are elongated along the equator of the oblique system, are larger in the line direction than in the sample direction. |