org.geotools.tile.impl

Class ScaleZoomLevelMatcher

Object

ScaleZoomLevelMatcher

public class ScaleZoomLevelMatcher
extends Object

This class is responsible for finding the right zoom-level for a given map extent.

Since:

12

Author:

to.srwn

Constructor Summary

Constructors

Constructor and Description
ScaleZoomLevelMatcher(CoordinateReferenceSystem crsMap, CoordinateReferenceSystem crsTiles, MathTransform transformMapToTileCrs, MathTransform transformTileCrsToMap, ReferencedEnvelope mapExtentTileCrs, ReferencedEnvelope mapExtentMapCrs, double scale)

Method Summary

Modifier and Type	Method and Description
static ScaleZoomLevelMatcher	createMatcher(ReferencedEnvelope requestExtent, CoordinateReferenceSystem crsTiles, double scale)
CoordinateReferenceSystem	getCrsMap()
CoordinateReferenceSystem	getCrsTiles()
ReferencedEnvelope	getMapExtentTileCrs()
double	getOptimumScaleFromZoomLevel(int zoomLevel, TileService wmtSource)
double	getOptimumScaleFromZoomLevel(int zoomLevel, TileService service, double[] tempScaleList) Calculates the "best" scale for a given zoom-level by calculating the scale for a tile in the center of the map-extent and by taking the mapCrs in account.
static ReferencedEnvelope	getProjectedEnvelope(ReferencedEnvelope envelope, CoordinateReferenceSystem destinationCRS, MathTransform transformation) Re-Projects the given envelope to destinationCRS using transformation.
double	getScale()
int	getZoomLevelFromScale(TileService service, double[] tempScaleList) Finds out the best fitting zoom-level for a given map-scale.
ReferencedEnvelope	projectMapToTileCrs(ReferencedEnvelope boundsInMapCrs)
ReferencedEnvelope	projectTileToMapCrs(ReferencedEnvelope boundsInTileCrs)

Methods inherited from class Object

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

Constructor Detail

ScaleZoomLevelMatcher

public ScaleZoomLevelMatcher(CoordinateReferenceSystem crsMap,
                             CoordinateReferenceSystem crsTiles,
                             MathTransform transformMapToTileCrs,
                             MathTransform transformTileCrsToMap,
                             ReferencedEnvelope mapExtentTileCrs,
                             ReferencedEnvelope mapExtentMapCrs,
                             double scale)

Method Detail

createMatcher

public static ScaleZoomLevelMatcher createMatcher(ReferencedEnvelope requestExtent,
                                                  CoordinateReferenceSystem crsTiles,
                                                  double scale)
                                           throws FactoryException,
                                                  TransformException

Throws:

FactoryException

TransformException

getProjectedEnvelope

public static ReferencedEnvelope getProjectedEnvelope(ReferencedEnvelope envelope,
                                                      CoordinateReferenceSystem destinationCRS,
                                                      MathTransform transformation)
                                               throws TransformException,
                                                      FactoryException

Re-Projects the given envelope to destinationCRS using transformation.

Parameters:

envelope -

destinationCRS -

transformation -

Returns:

Throws:

Exception

TransformException

FactoryException

getCrsMap

public CoordinateReferenceSystem getCrsMap()

getCrsTiles

public CoordinateReferenceSystem getCrsTiles()

getMapExtentTileCrs

public ReferencedEnvelope getMapExtentTileCrs()

getScale

public double getScale()

getZoomLevelFromScale

public int getZoomLevelFromScale(TileService service,
                                 double[] tempScaleList)

Finds out the best fitting zoom-level for a given map-scale.

Parameters:

service -

tempScaleList -

Returns:

getOptimumScaleFromZoomLevel

public double getOptimumScaleFromZoomLevel(int zoomLevel,
                                           TileService service,
                                           double[] tempScaleList)

Calculates the "best" scale for a given zoom-level by calculating the scale for a tile in the center of the map-extent and by taking the mapCrs in account. "Best" scale is the scale where a 256x256 tile has also this size when displayed in uDig.

Parameters:

zoomLevel -

service -

tempScaleList -

Returns:

getOptimumScaleFromZoomLevel

public double getOptimumScaleFromZoomLevel(int zoomLevel,
                                           TileService wmtSource)

projectTileToMapCrs

public ReferencedEnvelope projectTileToMapCrs(ReferencedEnvelope boundsInTileCrs)
                                       throws Exception

Throws:

Exception

projectMapToTileCrs

public ReferencedEnvelope projectMapToTileCrs(ReferencedEnvelope boundsInMapCrs)
                                       throws Exception

Throws:

Exception