[postgis-tickets] [PostGIS] #4156: ST_ChaikinSmoothing not treating inner and outer rings the same

Wed Sep 19 07:02:05 PDT 2018

#4156: ST_ChaikinSmoothing not treating inner and outer rings the same
----------------------+---------------------------
  Reporter:  komzpa   |      Owner:  nicklas
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.0.0
 Component:  postgis  |    Version:  trunk
Resolution:           |   Keywords:
----------------------+---------------------------

Comment (by komzpa):

 Original report has a mistake, last parameter on polygons is expected to
 be "false".

 Here are two inputs:

 2-minute isochrone:
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

 1-minute isochrone:
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

 They are nested and match inner-to-outer: https://ibb.co/h8g4Uz

 I pass them through ST_ChaikinSmoothing:

 update eventspace_isochrones set geom = ST_ChaikinSmoothing(geom, 2);

 They don't match:

 https://ibb.co/jVk9we

 This is seen on all isochrones.

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4156#comment:5>
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