uk.ac.ucl.casa.andrew.phd.segModelPolygonRandom
Class SegGISModelRandom

java.lang.Object
  uchicago.src.sim.engine.SimModelImpl
      uk.ac.ucl.casa.andrew.phd.segModelPolygonRandom.SegGISModelRandom

All Implemented Interfaces:

uchicago.src.reflector.DescriptorContainer, uchicago.src.sim.engine.SimEventProducer, uchicago.src.sim.engine.SimModel

public class SegGISModelRandom

extends uchicago.src.sim.engine.SimModelImpl

All the models up to this point have focused on agents moving within the environment to which they are located. What has become noticeable is the importance of space especially the development of empty space when segregation emerges. This model moves away from representing agents as points, to representing them as polygons, such as building outlines or groups of individuals aggregated into wards. The aim of this model is to explore the importance of empty space on the pattern of segregation that emerges. As with previous models, this extends the basic model. However instead of creating point agents of different types based on population fields held within the data file of the shapefile, polygon agents are created, while this is done randomly agents can be created based on the dominant social group of the area held within the data file if required (see segModelPolygonRandom model) . Within the model, two types of agents are created either of type red or blue, while a certain percentage of area remains unoccupied (black). Each polygon knows which other polygons share a common edge to it. These neighbourhoods are stored within the .GAL file Each polygon has different numbers of neighbours, therefore areas that are separated by geographical features such as rivers are not considered neighbours. What drives the model is the neighbourhood composition, as with the basic segregation model; agents want to live in an area where a certain percentage of their neighbours are of the same type as itself. This is calculated using the neighbours that share a common edge to the agent in question. If an agent is dissatisfied with its current neighbourhood it will move to a random empty polygon, regardless of whether or not this new location meets its preference. This was done to force the agents to move. For example if the agents only moved to areas where there preferences could be matched and there where no areas where this could be achieved, the system would not evolve. As unlike the basic segregation models agents are not removed. Each time an agent moves from an occupied to an unoccupied area, a counter is updated on the area where the agent has just moved to therefore allowing one to study how often agents move throughout the course of a simulation.

Author:

Andrew Crooks
Centre for Advanced Spatial Analysis, University College London.

Nested Class Summary

(package private) class	SegGISModelRandom.happystatsBlue
(package private) class	SegGISModelRandom.happystatsReds
(package private) class	SegGISModelRandom.unhappystatsBlue
(package private) class	SegGISModelRandom.unhappystatsReds
(package private) class	SegGISModelRandom.unoccupiedstats

Field Summary

(package private) static java.lang.String	datasource1
(package private) javax.swing.JFileChooser	fileChooser
(package private) OpenMapData	gisData
(package private) static java.lang.String	neighbourhoodFile1
private uchicago.src.sim.gui.Legend	newlegend
(package private) anl.repast.gis.display.OpenMapDisplay	omDisplay
(package private) double	perBlue
(package private) double	PERBLUE
(package private) double	perRed
(package private) double	PERRED
private uchicago.src.sim.analysis.OpenSequenceGraph	recorderHappyAgentsGraph
private uchicago.src.sim.analysis.DataRecorder	recorderLanduse
(package private) static boolean	saveDataOn
(package private) uchicago.src.sim.engine.Schedule	schedule
private int	simulationSpeed
(package private) static boolean	snapshotOn
(package private) int	STEP_NUM
(package private) double	toleranceBlue
(package private) double	TOLERANCEBLUE
(package private) double	toleranceRed
(package private) double	TOLERANCERED
(package private) double	totalArea
(package private) double	unoccupied
(package private) double	UNOCCUPIED
(package private) java.util.ArrayList	urbanAgentList

Fields inherited from class uchicago.src.sim.engine.SimModelImpl

descriptors, modelManipulator

Constructor Summary

SegGISModelRandom()

Method Summary

void	begin()
void	buildDisplay()
void	buildModel()
void	buildSchedule() Schedules the execution of the specified method (ie step)on the specified object(ie this model) to start at the specified clock tick and continue every tick thereafter.
void	closeModel() Checks to see if all the agents are happy.
void	createShapefileForUrbanAgent()
java.lang.String[]	getInitParam()
java.lang.String	getName()
java.util.ArrayList	getNeighborAgents(int[] neighbors) Tells the polgon agent what is next to what neighbours comes from .GAL file
double	getPerBlue()
double	getPerRed()
boolean	getSaveDataOn()
uchicago.src.sim.engine.Schedule	getSchedule() Schedule manages the execution of BasicAction accoriding to the simulation clock.
boolean	getSnapshotOn()
int	getSTEP_NUM()
double	getToleranceBlue()
double	getToleranceRed()
double	getUnoccupied()
java.util.ArrayList	getUrbanAgentList()
static void	main(java.lang.String[] args)
void	postStep()
void	preStep()
void	reset() The reset mmethod is called whenever the model is reset.
void	saveGALFile()
void	saveShapefile() Any change to the urban layer is saved to a new shapefile Which is time stamped and a new GAL file is also created which corresponds to the new shapefile created.
void	setPerBlue(double d)
void	setPerRed(double d)
void	setSaveDataOn(boolean show)
void	setSnapshotOn(boolean show)
void	setSTEP_NUM(int step_num)
void	setToleranceBlue(double d)
void	setToleranceRed(double d)
void	setUnoccupied(double d)
void	setup()
void	setUrbanAgentList(java.util.ArrayList agentList)
void	step()
void	takesnapshot()

Methods inherited from class uchicago.src.sim.engine.SimModelImpl

addPropertyListener, addSimEventListener, clearMediaProducers, clearPropertyListeners, fireBooleanPropertyEvent, fireEndSim, fireNumericPropertyEvent, fireObjectPropertyEvent, firePauseSim, fireSimEvent, fireStopSim, fireStringPropertyEvent, generateNewSeed, getController, getMediaProducers, getModelManipulator, getParameterDescriptors, getPropertiesValues, getRngSeed, getTickCount, pause, registerDisplaySurface, registerMediaProducer, removePropertyListener, removeSimEventListener, setController, setRngSeed, stop

Methods inherited from class java.lang.Object

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

Field Detail

fileChooser

javax.swing.JFileChooser fileChooser

PERRED

double PERRED

PERBLUE

double PERBLUE

UNOCCUPIED

double UNOCCUPIED

TOLERANCERED

double TOLERANCERED

TOLERANCEBLUE

double TOLERANCEBLUE

toleranceRed

double toleranceRed

toleranceBlue

double toleranceBlue

perRed

double perRed

perBlue

double perBlue

unoccupied

double unoccupied

totalArea

double totalArea

snapshotOn

static boolean snapshotOn

saveDataOn

static boolean saveDataOn

datasource1

static java.lang.String datasource1

neighbourhoodFile1

static java.lang.String neighbourhoodFile1

gisData

OpenMapData gisData

omDisplay

anl.repast.gis.display.OpenMapDisplay omDisplay

urbanAgentList

java.util.ArrayList urbanAgentList

schedule

uchicago.src.sim.engine.Schedule schedule

STEP_NUM

int STEP_NUM

simulationSpeed

private int simulationSpeed

recorderLanduse

private uchicago.src.sim.analysis.DataRecorder recorderLanduse

recorderHappyAgentsGraph

private uchicago.src.sim.analysis.OpenSequenceGraph recorderHappyAgentsGraph

newlegend

private uchicago.src.sim.gui.Legend newlegend

Constructor Detail

SegGISModelRandom

public SegGISModelRandom()

Method Detail

main

public static void main(java.lang.String[] args)

begin

public void begin()

buildModel

public void buildModel()

buildDisplay

public void buildDisplay()

buildSchedule

public void buildSchedule()

Schedules the execution of the specified method (ie step)on the specified object(ie this model) to start at the specified clock tick and continue every tick thereafter.

closeModel

public void closeModel()

Checks to see if all the agents are happy. if they are the model will close.

step

public void step()

preStep

public void preStep()

postStep

public void postStep()

getNeighborAgents

public java.util.ArrayList getNeighborAgents(int[] neighbors)

Tells the polgon agent what is next to what neighbours comes from .GAL file

Parameters:

neighbors -

Returns:

setup

public void setup()

reset

public void reset()

The reset mmethod is called whenever the model is reset. Everything is reset to null

getSchedule

public uchicago.src.sim.engine.Schedule getSchedule()

Schedule manages the execution of BasicAction accoriding to the simulation clock. Actions schedulled on a schedule will be executed in a random order.

saveShapefile

public void saveShapefile()

Any change to the urban layer is saved to a new shapefile Which is time stamped and a new GAL file is also created which corresponds to the new shapefile created.

createShapefileForUrbanAgent

public void createShapefileForUrbanAgent()

takesnapshot

public void takesnapshot()

saveGALFile

public void saveGALFile()

getName

public java.lang.String getName()

getInitParam

public java.lang.String[] getInitParam()

getSaveDataOn

public boolean getSaveDataOn()

setSaveDataOn

public void setSaveDataOn(boolean show)

getSnapshotOn

public boolean getSnapshotOn()

setSnapshotOn

public void setSnapshotOn(boolean show)

setUnoccupied

public void setUnoccupied(double d)

getUnoccupied

public double getUnoccupied()

setPerBlue

public void setPerBlue(double d)

getPerBlue

public double getPerBlue()

setPerRed

public void setPerRed(double d)

getPerRed

public double getPerRed()

setToleranceRed

public void setToleranceRed(double d)

getToleranceRed

public double getToleranceRed()

setToleranceBlue

public void setToleranceBlue(double d)

getToleranceBlue

public double getToleranceBlue()

getUrbanAgentList

public java.util.ArrayList getUrbanAgentList()

setUrbanAgentList

public void setUrbanAgentList(java.util.ArrayList agentList)

getSTEP_NUM

public int getSTEP_NUM()

setSTEP_NUM

public void setSTEP_NUM(int step_num)