gov.nasa.worldwind.util

Class ElevationsUtil

java.lang.Object

gov.nasa.worldwind.util.ElevationsUtil

public class ElevationsUtil
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static double	DEM_DEFAULT_MISSING_SIGNAL
static double	DTED_DEFAULT_MISSING_SIGNAL
protected static double[]	knownMissingSignals
static double	SRTM_DEFAULT_MISSING_SIGNAL

Constructor Summary

Constructors

Constructor and Description
ElevationsUtil()

Method Summary

Modifier and Type	Method and Description
static boolean	isKnownMissingSignal(Double value) Checks if the value is one of the well-known "nodata" value used in digital elevation model files to specify missing areas / voids.
static void	rectify(ByteBufferRaster raster) Rectify elevation raster.

Methods inherited from class java.lang.Object

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

Field Detail

DEM_DEFAULT_MISSING_SIGNAL

public static final double DEM_DEFAULT_MISSING_SIGNAL

See Also:

Constant Field Values

DTED_DEFAULT_MISSING_SIGNAL

public static final double DTED_DEFAULT_MISSING_SIGNAL

See Also:

Constant Field Values

knownMissingSignals

protected static final double[] knownMissingSignals

SRTM_DEFAULT_MISSING_SIGNAL

public static final double SRTM_DEFAULT_MISSING_SIGNAL

See Also:

Constant Field Values

Constructor Detail

ElevationsUtil

public ElevationsUtil()

Method Detail

isKnownMissingSignal

public static boolean isKnownMissingSignal(Double value)

Checks if the value is one of the well-known "nodata" value used in digital elevation model files to specify missing areas / voids.

Parameters:

value - a value to check

Returns:

TRUE, if the value is one of the well known "nodata" values

rectify

public static void rectify(ByteBufferRaster raster)
                    throws IllegalArgumentException

Rectify elevation raster. For best performance each elevation raster must have correct parameters and values set. The rectify() operation validates that correct Elevation min and max values are set or calculated. All values that beyond min/max and voids, must be marked with "Missing Signal" (aka "nodata" value).

Parameters:

raster - A DataRaster to rectify

Throws:

IllegalArgumentException - if raster is null