org.geotools.renderer.crs

Class WrappingProjectionHandler

Object

ProjectionHandler

WrappingProjectionHandler

public class WrappingProjectionHandler
extends ProjectionHandler

A ProjectionHandler for projections that do warp in the East/West direction, it will replicate the geometries generating a Google Maps like effect

Author:

Andrea Aime - OpenGeo

Field Summary

Fields inherited from class ProjectionHandler

datelineX, EPS, geometryCRS, LOGGER, noReprojection, queryAcrossDateline, radius, renderingEnvelope, sourceCRS, targetCRS, validaAreaTester, validArea, validAreaBounds

Constructor Summary

Constructors

Constructor and Description
WrappingProjectionHandler(ReferencedEnvelope renderingEnvelope, ReferencedEnvelope validArea, CoordinateReferenceSystem sourceCrs, double centralMeridian, int maxWraps) Provides the strategy with the area we want to render and its CRS (the SPI lookup will do this step)

Method Summary

Modifier and Type	Method and Description
boolean	isDatelineWrappingCheckEnabled()
Geometry	postProcess(MathTransform mt, Geometry geometry) Processes the geometry already projected to the target SRS.
boolean	requiresProcessing(Geometry geometry) Returns true if the geometry needs special handling
void	setDatelineWrappingCheckEnabled(boolean datelineWrappingCheckEnabled) Enables the check using the "half world" heuristic on the input geometries, if larger it assumes they spanned the dateline.

Methods inherited from class ProjectionHandler

accumulateTransforms, addGeometries, computeDatelineX, concatenateTransforms, getQueryEnvelopes, getRenderingEnvelope, getRenderingTransform, getSourceCRS, getSourceEnvelopes, getValidAreaBounds, intersect, mergeEnvelopes, preProcess, reprojectEnvelopes, setCentralMeridian, transformEnvelope

Methods inherited from class Object

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

Constructor Detail

WrappingProjectionHandler

public WrappingProjectionHandler(ReferencedEnvelope renderingEnvelope,
                                 ReferencedEnvelope validArea,
                                 CoordinateReferenceSystem sourceCrs,
                                 double centralMeridian,
                                 int maxWraps)
                          throws FactoryException

Provides the strategy with the area we want to render and its CRS (the SPI lookup will do this step)

Throws:

FactoryException

Method Detail

postProcess

public Geometry postProcess(MathTransform mt,
                            Geometry geometry)

Description copied from class: ProjectionHandler

Processes the geometry already projected to the target SRS. May return null if the geometry is not to be drawn.

Overrides:

postProcess in class ProjectionHandler

Parameters:

mt - optional reverse transformation to facilitate unwrapping

requiresProcessing

public boolean requiresProcessing(Geometry geometry)

Description copied from class: ProjectionHandler

Returns true if the geometry needs special handling

Overrides:

requiresProcessing in class ProjectionHandler

isDatelineWrappingCheckEnabled

public boolean isDatelineWrappingCheckEnabled()

setDatelineWrappingCheckEnabled

public void setDatelineWrappingCheckEnabled(boolean datelineWrappingCheckEnabled)

Enables the check using the "half world" heuristic on the input geometries, if larger it assumes they spanned the dateline. Enabled by default

Parameters:

datelineWrappingCheckEnabled -