[postgis-devel] [PostGIS] #1714: totopogeom - can't add multipolygo

[PostGIS]

#1714: totopogeom - can't add multipolygo
----------------------+-----------------------------------------------------
 Reporter:  robe      |       Owner:  strk         
     Type:  defect    |      Status:  new          
 Priority:  medium    |   Milestone:  PostGIS 2.0.1
Component:  topology  |     Version:  trunk        
 Keywords:            |  
----------------------+-----------------------------------------------------

Comment(by strk):

 It seems to be snapping to nodes that makes it become non-simple:
 {{{
 DEBUG:  Unioned: MULTILINESTRING((765795.233731932
 2949559.16014178,765795.233731932 2949558.8354405,765795.071381291
 2949559.16014178),(765795.071381291 2949559.16014178,765795.233731932
 2949559.16014178))
 DEBUG:  Intersecting nodes: MULTIPOINT(765795.071381291 2949559.16014178)
 DEBUG:  Snapped to nodes: MULTILINESTRING((765795.071381291
 2949559.16014178,765795.233731932 2949558.8354405,765795.071381291
 2949559.16014178),(765795.071381291 2949559.16014178,765795.071381291
 2949559.16014178))
 }}}

 Snap input is simple, snap output isn't:
 {{{
 strk=# select st_issimple( 'MULTILINESTRING((765795.233731932
 2949559.16014178,765795.233731932 2949558.8354405,765795.071381291
 2949559.16014178),(765795.071381291 2949559.16014178,765795.233731932
 2949559.16014178))' );
  st_issimple
 -------------
  t
 (1 row)

 strk=# select st_issimple( 'MULTILINESTRING((765795.071381291
 2949559.16014178,765795.233731932 2949558.8354405,765795.071381291
 2949559.16014178),(765795.071381291 2949559.16014178,765795.071381291
 2949559.16014178))' );
  st_issimple
 -------------
  f
 (1 row)
 }}}

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1714#comment:2>
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