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Description:
This attribute
controls whether points on the boundary of a
Region are considered to be inside or outside the region.
If the attribute value is non-zero (the default), points on the boundary are considered to be inside the
region (that is, the Region is
"
closed
"
). However, if the attribute value is zero, points on the bounary
are considered to be outside the region.
Type:
Integer (boolean). Applicability
Region
All Regions
have this attribute.
The value of the Closed attribute is ignored by PointList regions. If
the PointList region has not been negated, then it is always assumed to be closed. If the
PointList region has been negated, then it is always assumed to be open. This is required since
points have zero volume and therefore consist entirely of boundary.
The
default Closed value for a CmpRegion is the Closed value of its first component Region.
The default Closed value for an Stc is the Closed value of its encapsulated Region.
Copyright (C) 2017 East Asian Observatory
- ←Prev
- AST
A Library for Handling
World Coordinate
Systems
in Astronomy - Next→
- TOC ↑