[geos-devel] [GEOS] #978: UnaryUnion topology exception

[GEOS]

#978: UnaryUnion topology exception
------------------------+---------------------------
 Reporter:  komzpa      |       Owner:  geos-devel@…
     Type:  defect      |      Status:  reopened
 Priority:  major       |   Milestone:
Component:  Default     |     Version:  3.7.0
 Severity:  Unassigned  |  Resolution:
 Keywords:              |
------------------------+---------------------------
Changes (by komzpa):

 * status:  closed => reopened
 * resolution:  invalid =>


Comment:

 Hello,

 Input is a collection of overlapping valid polygons, and it's exactly
 semantics of Unary Union to dissolve it into a single (multi)polygon.

 {{{
 20:05:40 [gis] >  select  ST_IsValid((ST_Dump(w_geom)).geom) from
 tmp_osm_population_raw_nowater where p_geom &&
 '(539614.84560837818,6759705.8015133878)'::point::geometry::box2d and
 ctid='(32000,1)'  ;
 ┌────────────┐
 │ st_isvalid │
 ├────────────┤
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 │ t          │
 └────────────┘
 (11 rows)

 Time: 6,458 ms
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/geos/ticket/978#comment:2>
GEOS <http://trac.osgeo.org/geos>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).