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FillFactor - Fraction of the Region which is of interest

Description:
This attribute indicates the fraction of the Region which is of interest. AST does not use this attribute internally for any purpose. Typically, it could be used to indicate the fraction of the Region for which data is available.

The supplied value must be in the range 0.0 to 1.0, and the default value is 1.0 (except as noted below).

Type:
Floating point.
Class Applicability:
Region
All Regions have this attribute.
CmpRegion
The default FillFactor for a CmpRegion is the FillFactor of its first component Region.
Prism
The default FillFactor for a Prism is the product of the FillFactors of its two component Regions.
Stc
The default FillFactor for an Stc is the FillFactor of its encapsulated Region.


next up previous 264
Next: FitsDigits - Digits of precision for floating point FITS values
Up: AST Attribute Descriptions
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council