public class Polygonizer
extends java.lang.Object
Geometry
s which contain linework that
represents the edges of a planar graph.
All types of Geometry are accepted as input;
the constituent linework is extracted as the edges to be polygonized.
The processed edges must be correctly noded; that is, they must only meet
at their endpoints. Polygonization will accept incorrectly noded input
but will not form polygons from non-noded edges,
and reports them as errors.
The Polygonizer reports the follow kinds of errors:
Constructor | Description |
---|---|
Polygonizer() |
Creates a polygonizer with the same
GeometryFactory
as the input Geometry s. |
Polygonizer(boolean extractOnlyPolygonal) |
Creates a polygonizer and allow specifying if only polygons which form a valid polygonal geometry are to be extracted.
|
Modifier and Type | Method | Description |
---|---|---|
void |
add(java.util.Collection geomList) |
Adds a collection of geometries to the edges to be polygonized.
|
void |
add(Geometry g) |
Add a
Geometry to the edges to be polygonized. |
java.util.Collection |
getCutEdges() |
Gets the list of cut edges found during polygonization.
|
java.util.Collection |
getDangles() |
Gets the list of dangling lines found during polygonization.
|
Geometry |
getGeometry() |
Gets a geometry representing the polygons formed by the polygonization.
|
java.util.Collection |
getInvalidRingLines() |
Gets the list of lines forming invalid rings found during polygonization.
|
java.util.Collection |
getPolygons() |
Gets the list of polygons formed by the polygonization.
|
void |
setCheckRingsValid(boolean isCheckingRingsValid) |
Allows disabling the valid ring checking,
to optimize situations where invalid rings are not expected.
|
public Polygonizer()
GeometryFactory
as the input Geometry
s.
The output mask is #ALL_POLYS
.public Polygonizer(boolean extractOnlyPolygonal)
extractOnlyPolygonal
- true if only polygons which form a valid polygonal geometry are to be extractedpublic void add(java.util.Collection geomList)
geomList
- a list of Geometry
s with linework to be polygonizedpublic void add(Geometry g)
Geometry
to the edges to be polygonized.
May be called multiple times.
Any dimension of Geometry may be added;
the constituent linework will be extracted and usedg
- a Geometry
with linework to be polygonizedpublic void setCheckRingsValid(boolean isCheckingRingsValid)
The default is true
.
isCheckingRingsValid
- true if generated rings should be checked for validitypublic java.util.Collection getPolygons()
Polygon
spublic Geometry getGeometry()
Polygonal
geometry.public java.util.Collection getDangles()
LineString
s which are danglespublic java.util.Collection getCutEdges()
LineString
s which are cut edgespublic java.util.Collection getInvalidRingLines()
LineString
s which form invalid ringsCopyright © 2018. All rights reserved.