[geos-devel] [GEOS] #1022: Buffering a specific closed linestring erroneously produces polygon without hole.

[GEOS]

#1022: Buffering a specific closed linestring erroneously produces polygon without
hole.
------------------------+--------------------------
 Reporter:  uclaros     |      Owner:  geos-devel@…
     Type:  defect      |     Status:  new
 Priority:  major       |  Milestone:
Component:  Default     |    Version:  3.8.0
 Severity:  Unassigned  |   Keywords:
------------------------+--------------------------
 Applying a buffer of 1m on the following linestring
 {{{
 LineString (278601.0234000000054948 4295292.71929999999701977,
 278598.71919999999227002 4295290.49340000003576279,
 278589.06283691781572998 4295303.48101469129323959,
 278605.49300000001676381 4295297.03689999971538782,
 278601.0234000000054948 4295292.71929999999701977)
 }}}
 produces a polygon without a hole, only outer ring.
 If any of the three almost-aligned nodes is moved, the expected result is
 returned: a polygon with a hole (one outer ring, one inner ring).

 Found on QGIS and confirmed on shapely with geos 3.8.0

-- 
Ticket URL: <https://trac.osgeo.org/geos/ticket/1022>
GEOS <http://trac.osgeo.org/geos>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).