[geos-devel] [GEOS] #713: [Patch] Add GeometryPrecisionReducer to C API

GEOS geos-trac at osgeo.org
Mon Dec 8 10:08:41 PST 2014

#713: [Patch] Add GeometryPrecisionReducer to C API
 Reporter:  smani       |       Owner:  geos-devel@…              
     Type:  defect      |      Status:  new                       
 Priority:  major       |   Milestone:  3.4.3                     
Component:  Default     |     Version:  3.4.2                     
 Severity:  Unassigned  |    Keywords:                            
 The attached patch adds methods for using the GeometryPrecisionReducer to
 the C API. I'm using these methods in QGIS to achieve better results when
 performing operations on geometries which occasionally suffer from
 precision issues.

 Related to the subject: I noticed that
 geos::precision::GeometryPrecisionReducer::targetPM is a const-reference
 to a geos::geom::PrecisionModel. Unless there are specific reasons for
 this, API-wise it would probably be cleaner to just store a copy of the
 PrecisionModel (since it is a tiny class) - this is what one would most
 likely expect to happen when seeing the "const geom::PrecisionModel &pm"
 in the constructor signature.

 As far as the patch is concerned, storing the targetPM as a copy would
 remove the need to keeping the GEOSPrecisionModel around.

Ticket URL: <http://trac.osgeo.org/geos/ticket/713>
GEOS <http://geos.refractions.net/>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).

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