[postgis-tickets] [PostGIS] #2508: st_OffsetCurve bug for geometries where St_IsSimple return false

[PostGIS]

#2508: st_OffsetCurve bug for geometries where St_IsSimple return false
---------------------+------------------------------------------------------
 Reporter:  francob  |       Owner:  pramsey
     Type:  defect   |      Status:  new    
 Priority:  medium   |   Milestone:         
Component:  postgis  |     Version:  2.0.x  
 Keywords:           |  
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 version
 "POSTGIS="2.1.0 r11822" GEOS="3.4.2-CAPI-1.8.2 r3921"

 st_OffsetCurve doesnt' work for geometries where St_IsSimple return false.

 Example:

 geom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


 {{{
 SELECT st_OffsetCurve(geom,10)
 }}}
 return
 ERROR:  GEOSOffsetCurve: TopologyException: assigned depths do not match
 at 1512895.9378084207 5033276.5839699283


 {{{
 SELECT st_OffsetCurve(st_SimplifyPreserveTopology((geom),0.6),10)
 }}}
 return (same error)
 ERROR:  GEOSOffsetCurve: TopologyException: assigned depths do not match
 at 1512895.9378084207 5033276.5839699283


 {{{
 SELECT st_OffsetCurve(st_SimplifyPreserveTopology((geom),0.7),10)
 }}}
 works


 If you need I have more sxample geometries

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2508>
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