Package org.geotools.coverage.grid.io

Class ReadResolutionCalculator

Object

ReadResolutionCalculator

public class ReadResolutionCalculator
extends Object

Class that supports readers in computing the proper reading resolution for a given grid geometry

Constructor Summary

Constructors

Constructor	Description
ReadResolutionCalculator(GridGeometry2D requestedGridGeometry, CoordinateReferenceSystem nativeCrs, double[] fullResolution)

Method Summary

Modifier and Type	Method	Description
double[]	computeRequestedResolution(ReferencedEnvelope readBounds)	Computes the requested resolution which is going to be used for selecting overviews and or deciding decimation factors on the target coverage.
int	getMaxOversamplingFactor()
boolean	isAccurateResolution()
void	setAccurateResolution(boolean accurateResolution)
void	setMaxOversamplingFactor(int maxOversamplingFactor)	Sets the max oversampling factor for resolution calculation.

Methods inherited from class Object

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

Constructor Details

ReadResolutionCalculator

public ReadResolutionCalculator(GridGeometry2D requestedGridGeometry,
 CoordinateReferenceSystem nativeCrs,
 double[] fullResolution)
                         throws FactoryException

Throws:

FactoryException

Method Details

computeRequestedResolution

public double[] computeRequestedResolution(ReferencedEnvelope readBounds)

Computes the requested resolution which is going to be used for selecting overviews and or deciding decimation factors on the target coverage.

In case the requested envelope is in the same CoordinateReferenceSystem of the coverage we compute the resolution using the requested MathTransform. Notice that it must be a LinearTransform or else we fail.

In case the requested envelope is not in the same CoordinateReferenceSystem of the coverage we

Throws:

DataSourceException - in case something bad happens during reprojections and/or intersections.

isAccurateResolution

public boolean isAccurateResolution()

setAccurateResolution

public void setAccurateResolution(boolean accurateResolution)

getMaxOversamplingFactor

public int getMaxOversamplingFactor()

setMaxOversamplingFactor

public void setMaxOversamplingFactor(int maxOversamplingFactor)

Sets the max oversampling factor for resolution calculation. That is, in case of high deformation on reprojection, how much higher the read resolution can be, compared to the known maximum resolution. This affects raster readers that can do internal resampling operations like a heterogeneous CRS mosaic, in which there is a resampling step to go from native CRS to the declared one.