jwo.landserf.process
Class PointDensityThread

java.lang.Object
  java.lang.Thread
      jwo.landserf.process.LSThread
          jwo.landserf.process.PointDensityThread

All Implemented Interfaces:

JWInterruptionListener, Runnable

public class PointDensityThread

extends LSThread

Calculates the point density of a given vector coverage. Requires an input vector and raster. The raster provided determines the resolution of the density surface. The windowSize parameter determines the local area used to calculate density. Only point objects from the input vector map are processed.

Version:

2.2, 26th February, 2005.

Author:

Jo Wood

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

PointDensityThread(GISFrame gisFrame, VectorMap vectorMap, RasterMap rasterMap, int windowSize)
Transforms the points in the given vector into a raster density surface.

Method Summary

void	doProcessing() Converts the vector points stored in the vector map provided to the constructor into a raster of point density values.

Methods inherited from class jwo.landserf.process.LSThread

checkStoppedThread, interruptionRequested, resetTimer, run, setErrorMessage, setMessage

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PointDensityThread

public PointDensityThread(GISFrame gisFrame,
                          VectorMap vectorMap,
                          RasterMap rasterMap,
                          int windowSize)

Transforms the points in the given vector into a raster density surface.

Parameters:

gisFrame - GUI in which to report results.

vectorMap - Vector containing points.

rasterMap - Raster to hold density surface. This raster defines bounds and resolution of output.

windowSize - Size of local window to use in density calculation. Should be odd and at least 1.

Method Detail

doProcessing

public void doProcessing()

Converts the vector points stored in the vector map provided to the constructor into a raster of point density values. The density surface is placed inside the raster map provided to the constructor.

Note that this method will be called automatically if this is run as a threaded process (e.g. myPointDensityThread.start()). Alternatively it can be called directly as a non-threaded process.

Specified by:

doProcessing in class LSThread

See Also:

GISFrame