[postgis-devel] [PostGIS] #299: Geography ST_Intersection -- check the brain-dead obvious before transformation

[Paragon Corporation]

Paul, 
I wasn't thinking of it so much as masking as avoiding it.  Though I guess
it depends how fast our st_distance check is since mythought was we check
for intersection or bbox intersection first.

Its more of an issue when we implement ST_Difference -- if they don't
intersect the difference is clear - why return me a drifted geometry instead
of the one I gave you?

I for one would prefer things like ST_Difference and ST_Intersection be
purely C so we can handle special cases without introducing drift or bad
drift when no perfect SRID fits both.

Thanks,
Regina

-----Original Message-----
From: postgis-devel-bounces at postgis.refractions.net
[mailto:postgis-devel-bounces at postgis.refractions.net] On Behalf Of PostGIS
Sent: Wednesday, November 11, 2009 11:02 PM
Cc: postgis-devel at postgis.refractions.net
Subject: Re: [postgis-devel] [PostGIS] #299: Geography ST_Intersection --
check the brain-dead obvious before transformation

#299: Geography ST_Intersection -- check the brain-dead obvious before
transformation
--------------------------+---------------------------------------------
--------------------------+----
  Reporter:  robe         |       Owner:  pramsey      
      Type:  enhancement  |      Status:  closed       
  Priority:  medium       |   Milestone:  postgis 2.0.0
 Component:  postgis      |     Version:  trunk        
Resolution:  wontfix      |    Keywords:               
--------------------------+---------------------------------------------
--------------------------+----
Changes (by pramsey):

  * status:  new => closed
  * resolution:  => wontfix

Comment:

 There's two issues in this ticket: should we try to mask transform drift?
 No. Should we implement the transform wrapped functionality purely in C?
 Maybe, can we talk on the list about it?

--
Ticket URL: <http://trac.osgeo.org/postgis/ticket/299#comment:1>
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