#531: UnaryUnion of an line collapsed to a point returns EMPTY
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Reporter: strk | Owner: geos-devel@…
Type: defect | Status: closed
Priority: major | Milestone: 3.8.0
Component: Default | Version: 3.3.3
Severity: Unassigned | Resolution: wontfix
Keywords: |
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Comment (by mdavis):
A further piece of information - the reason the result is EMPTY is that
the overlay algorithm simply ignores zero-length linestrings, on the basis
that they are invalid.
I guess another consistent behaviour would be to error out if zero-length
lines are detected (in the same way that invalid polygons usually cause an
error. That's sort of dodging the issue though.
--
Ticket URL: <https://trac.osgeo.org/geos/ticket/531#comment:9>
GEOS <http://trac.osgeo.org/geos>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite
(JTS).
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