com.luciad.fusion.util

LuciadFusionClass TLfnScaleUtil

java.lang.Object

com.luciad.fusion.util.TLfnScaleUtil

public final class TLfnScaleUtil
extends Object

Utility to calculate scales and levels for various inputs.

Since:

11.0

Field Summary

Fields

Modifier and Type	Field and Description
static int	UNKNOWN_SCALE_DENOMINATOR

Method Summary

Modifier and Type	Method and Description
static int	computeScaleDenominator(ILcdModel aModel, ILcdStatusListener aStatusListener) Compute the scale of a model.
static int	convertPixelDensityToScaleDenominator(double aPixelDensity, ILcdGeoReference aGeoReference) Calculates the scale denominator that corresponds to the pixel density, assuming a pixel size of 0.28 mm.
static int	getMaxLevel(ILcdBounds aBounds, ILcdGeoReference aGeoReference, long aLevel0Rows, long aLevel0Columns, List<TLfnVectorAssetMetadata> aAllAssetMetadata) Computes the most detailed level that is needed for the assets in a coverage.
static int	getOptimalScaleDenominator(ILcdBounds aBounds, ILcdGeoReference aGeoReference, long aLevel0Rows, long aLevel0Columns, int aLevel) Compute the optimal scale of a coverage at the specified level.

Methods inherited from class java.lang.Object

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

Field Detail

UNKNOWN_SCALE_DENOMINATOR

public static final int UNKNOWN_SCALE_DENOMINATOR

See Also:

Constant Field Values

Method Detail

convertPixelDensityToScaleDenominator

public static int convertPixelDensityToScaleDenominator(double aPixelDensity,
                                                        ILcdGeoReference aGeoReference)

Calculates the scale denominator that corresponds to the pixel density, assuming a pixel size of 0.28 mm.

Parameters:

aPixelDensity - the pixel density in pixels per square model unit

aGeoReference - the geographic reference

Returns:

the scale denominator, such that scale = (1 / scale denominator)

getMaxLevel

public static int getMaxLevel(ILcdBounds aBounds,
                              ILcdGeoReference aGeoReference,
                              long aLevel0Rows,
                              long aLevel0Columns,
                              List<TLfnVectorAssetMetadata> aAllAssetMetadata)

Computes the most detailed level that is needed for the assets in a coverage. The level is chosen such that its scale is greater than or equal to the largest asset scale.

Parameters:

aBounds - the coverage bounds

aGeoReference - the coverage geographic reference

aLevel0Rows - the number of rows at level 0 in the coverage

aLevel0Columns - the number of columns at level 0 in the coverage

aAllAssetMetadata - all the asset metadata to compute the max. level for

Returns:

the most detailed level, such that # levels = (max. level + 1)

getOptimalScaleDenominator

public static int getOptimalScaleDenominator(ILcdBounds aBounds,
                                             ILcdGeoReference aGeoReference,
                                             long aLevel0Rows,
                                             long aLevel0Columns,
                                             int aLevel)

Compute the optimal scale of a coverage at the specified level. The scale is such that a tile will be mapped to 256x256 pixels.

Parameters:

aBounds - the coverage bounds

aGeoReference - the coverage geographic reference

aLevel0Rows - the number of rows at level 0

aLevel0Columns - the number of columns at level 0

aLevel - the level

Returns:

the scale denominator, ie. scale = (1 / scaledenominator)

computeScaleDenominator

public static int computeScaleDenominator(ILcdModel aModel,
                                          ILcdStatusListener aStatusListener)

Compute the scale of a model.

The status listener can be used to monitor the progress of the computation.

Parameters:

aModel - the model

aStatusListener - the status listener or null

Returns:

the scale denominator, ie. scale = (1 / scaledenominator)