JTS Topology Suite version 1.12

com.vividsolutions.jts.simplify
Class DouglasPeuckerSimplifier

java.lang.Object
  extended by com.vividsolutions.jts.simplify.DouglasPeuckerSimplifier

public class DouglasPeuckerSimplifier
extends java.lang.Object

Simplifies a Geometry using the standard Douglas-Peucker algorithm. Ensures that any polygonal geometries returned are valid. Simple lines are not guaranteed to remain simple after simplification.

Note that in general D-P does not preserve topology - e.g. polygons can be split, collapse to lines or disappear holes can be created or disappear, and lines can cross. To simplify geometry while preserving topology use TopologyPreservingSimplifier. (However, using D-P is significantly faster).

Version:
1.7

Constructor Summary
DouglasPeuckerSimplifier(Geometry inputGeom)
           
 
Method Summary
 Geometry getResultGeometry()
           
 void setDistanceTolerance(double distanceTolerance)
          Sets the distance tolerance for the simplification.
 void setEnsureValid(boolean isEnsureValidTopology)
          Controls whether simplified polygons will be "fixed" to have valid topology.
static Geometry simplify(Geometry geom, double distanceTolerance)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DouglasPeuckerSimplifier

public DouglasPeuckerSimplifier(Geometry inputGeom)
Method Detail

simplify

public static Geometry simplify(Geometry geom,
                                double distanceTolerance)

setDistanceTolerance

public void setDistanceTolerance(double distanceTolerance)
Sets the distance tolerance for the simplification. All vertices in the simplified geometry will be within this distance of the original geometry. The tolerance value must be non-negative.

Parameters:
distanceTolerance - the approximation tolerance to use

setEnsureValid

public void setEnsureValid(boolean isEnsureValidTopology)
Controls whether simplified polygons will be "fixed" to have valid topology. The caller may choose to disable this because: The default is to fix polygon topology.

Parameters:
isEnsureValidTopology -

getResultGeometry

public Geometry getResultGeometry()

JTS Topology Suite version 1.12