[postgis-tickets] [PostGIS] #2093: Add extra policy argument to control ST_Simplify behavior

[PostGIS]

#2093: Add extra policy argument to control ST_Simplify behavior
--------------------------+---------------------------
  Reporter:  robe         |      Owner:  pramsey
      Type:  enhancement  |     Status:  new
  Priority:  medium       |  Milestone:  PostGIS 2.2.0
 Component:  postgis      |    Version:  trunk
Resolution:               |   Keywords:
--------------------------+---------------------------

Comment (by pramsey):

 So,

 * is changing the behaviour to preserve collapsed features not on at all?
 * if it **is** on, then how about some simple changes to ensure that any
 polygon preserved will be 4+ vertices and any line 2+ vertices (see patch
 above)
 * if it **isn't** on, then about about a simple boolean flag to turn on
 preserve-or-not behavior

 As strk has demonstrated above, the current behavior isn't exactly
 consistent... a collapsed line will come out as a single point, which is
 an invalid construction; a collapsed polygon will just go away. We should
 either have all collapsed things go away, or have them all survive as
 valid constructions (but not valid geometries, there's only so much we can
 do).

--
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2093#comment:28>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.