Selects the nature of the offset coordinate system SkyRefIs
"
Origin"
, "
Pole"
or "
Ignored"
.
If SkyRefIs is set to "
Origin"
, then the coordinate system represented by the
SkyFrame is modified to put the origin of longitude and latitude at the position
specified by the SkyRef attribute.
If SkyRefIs is set to "
Pole"
, then the coordinate system represented by the
SkyFrame is modified to put the north pole at the position specified by the SkyRef
attribute.
If SkyRefIs is set to "
Ignored"
(the default), then any value set for the SkyRef
attribute is ignored, and the SkyFrame represents the coordinate system specified by
the System attribute directly without any rotation.