#### Description:

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.

Type:

  String.

#### Applicability

##### SkyFrame

All SkyFrames have this attribute.
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