[postgis-tickets] [PostGIS] #2825: ST_Intersection broken with Z coordinates

PostGIS trac at osgeo.org
Mon Jul 7 13:13:38 PDT 2014


#2825: ST_Intersection broken with Z coordinates
----------------------------+-----------------------------------------------
  Reporter:  TBL            |       Owner:  robe         
      Type:  defect         |      Status:  new          
  Priority:  medium         |   Milestone:  PostGIS 2.1.4
 Component:  documentation  |     Version:  2.1.x        
Resolution:                 |    Keywords:               
----------------------------+-----------------------------------------------
Changes (by pramsey):

  * owner:  pramsey => robe
  * status:  reopened => new
  * component:  postgis => documentation


Comment:

 No, sorry, it's still just averaging. Take the value at (0,0) for example.

 The first line knows that Z at 0,0 is 2 and at 0.5,0.5 is 3, so
 interpolate, the value at 0.01,0.01 is 2.02

 The second line knows that Z at 0.01,0.01 is 10.

 The average of those values is 6.01, which is what we see.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2825#comment:10>
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