org.deegree.coverage.raster
Class MultiResolutionRaster

java.lang.Object
  org.deegree.coverage.AbstractCoverage
      org.deegree.coverage.raster.MultiResolutionRaster

public class MultiResolutionRaster
extends AbstractCoverage

This class represents a collection of AbstractRaster instances that describe the same spatial region, but with different resolutions.

Version:

$Revision: 21386 $, $Date: 2009-12-10 16:42:57 +0100 (Do, 10 Dez 2009) $

Author:

Oliver Tonnhofer, last edited by: $Author: rbezema $

Constructor Summary

MultiResolutionRaster()

Method Summary

void	addRaster(AbstractRaster raster) Adds a raster to the MultiResolution Pyramid
Envelope	getEnvelope()
AbstractRaster	getRaster(double res) Returns the best-fitting raster for a given resolution.
List<Double>	getResolutions() Returns a list with the highest resolution of every level.
AbstractRaster	getSubset(Envelope envelope, double resolution) Returns a subset of the raster for a given resolution.

Methods inherited from class org.deegree.coverage.AbstractCoverage

extendEnvelope, getCoordinateSystem, getGeometryFactory, getLabel, getName, getSupplementProperties, setCoordinateSystem, setEnvelope, setLabel, setName, setSupplementProperties

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiResolutionRaster

public MultiResolutionRaster()

Method Detail

addRaster

public void addRaster(AbstractRaster raster)

Adds a raster to the MultiResolution Pyramid

Parameters:

raster - raster to be added to the MultiResolutionRaster

getRaster

public AbstractRaster getRaster(double res)

Returns the best-fitting raster for a given resolution. This method tries to return the optimal raster for the requested resolution. It returns the next best resolution (lower resolution value) if available, otherwise it returns the next raster with a higher resolution value.

Parameters:

res - resolution in world units per pixel

Returns:

raster for resolution or null if no rasters were defined

getEnvelope

public Envelope getEnvelope()

Overrides:

getEnvelope in class AbstractCoverage

Returns:

The envelope of the coverage.

getSubset

public AbstractRaster getSubset(Envelope envelope,
                                double resolution)

Returns a subset of the raster for a given resolution. The matching raster is selected using getRaster(double).

Parameters:

envelope - envelope of the subset

resolution - resolution in world units per pixel

Returns:

subset of the best-fitting raster

See Also:

getRaster(double)

getResolutions

public List<Double> getResolutions()

Returns a list with the highest resolution of every level. The list is sorted ascending (from highest to lowest resolution).

Returns:

a list of all resolutions