This attribute provides a place to store a description of the type of sky projection used when a SkyFrame is attached to a 2-dimensional object, such as an image or plotting surface. For example, typical values might be " orthographic" , " Hammer-Aitoff" or " cylindrical equal area" .

The Projection value is purely descriptive and does not affect the celestial coordinate system represented by the SkyFrame in any way. If it is set to a non-blank string, the description provided may be used when forming the default value for the SkyFrame’ s Title attribute (so that typically it will appear in graphical output, for instance). The default value is an empty string.

SkyFrame