GEOS
3.8.0dev

Polygonizes a set of Geometrys which contain linework that represents the edges of a planar graph. More...
#include <Polygonizer.h>
Public Member Functions  
Polygonizer ()  
Create a polygonizer with the same GeometryFactory as the input Geometry.  
void  add (std::vector< geom::Geometry * > *geomList) 
Add a collection of geometries to be polygonized. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted and used. More...  
void  add (std::vector< const geom::Geometry * > *geomList) 
Add a collection of geometries to be polygonized. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted and used. More...  
void  add (geom::Geometry *g) 
void  add (const geom::Geometry *g) 
std::vector< geom::Polygon * > *  getPolygons () 
Gets the list of polygons formed by the polygonization. More...  
const std::vector< const geom::LineString * > &  getDangles () 
Get the list of dangling lines found during polygonization. More...  
const std::vector< const geom::LineString * > &  getCutEdges () 
Get the list of cut edges found during polygonization. More...  
const std::vector < geom::LineString * > &  getInvalidRingLines () 
Get the list of lines forming invalid rings found during polygonization. More...  
Protected Attributes  
PolygonizeGraph *  graph 
std::vector< const geom::LineString * >  dangles 
std::vector< const geom::LineString * >  cutEdges 
std::vector< geom::LineString * >  invalidRingLines 
std::vector< EdgeRing * >  holeList 
std::vector< EdgeRing * >  shellList 
std::vector< geom::Polygon * > *  polyList 
Friends  
class  Polygonizer::LineStringAdder 
Polygonizes a set of Geometrys which contain linework that represents the edges of a planar graph.
Any dimension of Geometry is handled  the constituent linework is extracted to form the edges. The edges must be correctly noded; that is, they must only meet at their endpoints. The Polygonizer will still run on incorrectly noded input but will not form polygons from incorrected noded edges.
The Polygonizer reports the follow kinds of errors:
void geos::operation::polygonize::Polygonizer::add  (  std::vector< geom::Geometry * > *  geomList  ) 
Add a collection of geometries to be polygonized. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted and used.
geomList  a list of Geometry with linework to be polygonized 
void geos::operation::polygonize::Polygonizer::add  (  std::vector< const geom::Geometry * > *  geomList  ) 
Add a collection of geometries to be polygonized. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted and used.
geomList  a list of Geometry with linework to be polygonized 
void geos::operation::polygonize::Polygonizer::add  (  geom::Geometry *  g  ) 
Add a geometry to the linework to be polygonized. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted and used
g  a Geometry with linework to be polygonized 
void geos::operation::polygonize::Polygonizer::add  (  const geom::Geometry *  g  ) 
Add a geometry to the linework to be polygonized. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted and used
g  a Geometry with linework to be polygonized 
const std::vector<const geom::LineString*>& geos::operation::polygonize::Polygonizer::getCutEdges  (  ) 
Get the list of cut edges found during polygonization.
const std::vector<const geom::LineString*>& geos::operation::polygonize::Polygonizer::getDangles  (  ) 
Get the list of dangling lines found during polygonization.
const std::vector<geom::LineString*>& geos::operation::polygonize::Polygonizer::getInvalidRingLines  (  ) 
Get the list of lines forming invalid rings found during polygonization.
std::vector<geom::Polygon*>* geos::operation::polygonize::Polygonizer::getPolygons  (  ) 
Gets the list of polygons formed by the polygonization.
Ownership of vector is transferred to caller, subsequent calls will return NULL.