com.vividsolutions.jts.algorithm
Class CentroidArea
java.lang.Object
com.vividsolutions.jts.algorithm.CentroidArea
public class CentroidArea
- extends Object
Computes the centroid of an area geometry.
Algorithm
Based on the usual algorithm for calculating
the centroid as a weighted sum of the centroids
of a decomposition of the area into (possibly overlapping) triangles.
The algorithm has been extended to handle holes and multi-polygons.
See http://www.faqs.org/faqs/graphics/algorithms-faq/
for further details of the basic approach.
The code has also be extended to handle degenerate (zero-area) polygons.
In this case, the centroid of the line segments in the polygon
will be returned.
- Version:
- 1.7
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CentroidArea
public CentroidArea()
add
public void add(Geometry geom)
- Adds the area defined by a Geometry to the centroid total.
If the geometry has no area it does not contribute to the centroid.
- Parameters:
geom
- the geometry to add
add
public void add(Coordinate[] ring)
- Adds the area defined by an array of
coordinates. The array must be a ring;
i.e. end with the same coordinate as it starts with.
- Parameters:
ring
- an array of Coordinate
s
getCentroid
public Coordinate getCentroid()
Copyright © 2012. All Rights Reserved.