[postgis-devel] Re: [PostGIS] #185: Enhancement to ST_PointOnSurface to support CIRCULARSTRINGS and MULTICURVES

PostGIS trac at osgeo.org
Sat Jun 6 11:12:12 PDT 2009


#185: Enhancement to ST_PointOnSurface to support CIRCULARSTRINGS and MULTICURVES
--------------------------+-------------------------------------------------
  Reporter:  robe         |       Owner:  pramsey      
      Type:  enhancement  |      Status:  new          
  Priority:  low          |   Milestone:  postgis 1.4.1
 Component:  postgis      |     Version:  1.4          
Resolution:               |    Keywords:               
--------------------------+-------------------------------------------------
Comment (by robe):

 I thought I had it bumped to 1.4.1?  If I hadn't apologize for that.  In
 fact as I discovered the MM specs  don't define
 ST_PointOnSurface/ST_Centroid for anything but Surfaces and MULTISurfaces
 (polygons, multipolygons, curvedpolygons ..).

 I had someone check Oracle -- Oracle goes by the letter on this and does
 not support PointOnsurface or centroid for anything but surface type
 geoms.

 IBM supports centroid but not point on surface for non-surfaces.
 SQL Server 2008 supports point on surface but not centroid for non-
 surfaces.

 So I'm acutally not sure what the expected behavior should be anyway.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/185#comment:3>
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