NatLonNatLon - Native longitude of the reference point of a FITS-WCS projection

Description:
This attribute gives the longitude of the reference point of the FITS-WCS projection implemented by a WcsMapWcsMap. The value is in radians in the "native spherical" coordinate system, and will usually be zero. See the description of attribute NatLatNatLat for further information.

The NatLon attribute is read-only.

Type:
Floating point, read-only.
Class Applicability:
WcsMap
All WcsMaps have this attribute.