[postgis-tickets] [PostGIS] #4350: MultiLinestring with gap returned as ST_OffsetCurve for simple linestring

PostGIS trac at osgeo.org
Mon Mar 18 07:28:25 PDT 2019


#4350: MultiLinestring with gap returned as ST_OffsetCurve for simple linestring
----------------------------+--------------------------
 Reporter:  rouen           |      Owner:  pramsey
     Type:  defect          |     Status:  new
 Priority:  medium          |  Milestone:  PostGIS GEOS
Component:  postgis         |    Version:  2.3.x
 Keywords:  ST_OffsetCurve  |
----------------------------+--------------------------
 I have simple linestring in srid 4326. Transforming it to srid 3857 and
 calling ST_OffsetCurve with distance -1 (meter) returns multilinestring
 with gap in the middle.

 WITH sample AS (
         SELECT ST_SetSRID(ST_GeomFromText('LINESTRING(18.9410244
 48.4221217,18.9411421 48.4221211,18.9413075 48.4221223,18.9413848
 48.4221223,18.9415133 48.4221223)'),4326) AS geom
 )
 SELECT ST_AsText(geom),
 ST_AsText(ST_Transform(ST_OffsetCurve(ST_Transform(geom,3857), -1),4326))
 FROM sample

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4350>
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