&GBNDSP
Controls the grid bounds for polar grids. The angles are measured in degrees from the positive X axis of the WCS. The radii are measured in WCS units.
Read/Write - Numeric Array - 4 Values
(1) - Start Angle
(2) - End
Angle
(3) - Start Radius
(4) - End Radius
Start Radius must be Greater Than
Zero.
End Radius must be Greater Than Start Radius.