gov.nasa.worldwind.terrain

Class LocalElevationModel.LocalTile

java.lang.Object

gov.nasa.worldwind.terrain.LocalElevationModel.LocalTile

Enclosing class:

LocalElevationModel

protected static class LocalElevationModel.LocalTile
extends java.lang.Object

An internal class that represents one elevation raster in the elevation model.

Field Summary

Fields

Modifier and Type	Field and Description
protected BufferWrapper	elevations The elevations.
protected double	maxElevation The maximum elevation contained in this tile's raster.
protected double	minElevation The minimum elevation contained in this tile's raster.
protected double	missingDataFlag The elevation model's missing data flag.
protected Sector	sector The sector the tile covers.
protected int	tileHeight The number of rows in the raster.
protected int	tileWidth The number of elevation values in a row of the raster.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LocalTile(Sector sector, double missingDataFlag, int tileWidth, int tileHeight, BufferWrapper elevations, java.lang.Double minEl, java.lang.Double maxEl) Constructs a new elevations tile.

Method Summary

Modifier and Type	Method and Description
protected void	computeMinMaxElevations() Determines the minimum and maximum elevations of this tile.
protected boolean	isMissingData(double value) Determines whether a value signifies missing data -- voids.

Methods inherited from class java.lang.Object

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

Field Detail

elevations

protected final BufferWrapper elevations

The elevations.

maxElevation

protected double maxElevation

The maximum elevation contained in this tile's raster.

minElevation

protected double minElevation

The minimum elevation contained in this tile's raster.

missingDataFlag

protected final double missingDataFlag

The elevation model's missing data flag.

sector

protected final Sector sector

The sector the tile covers.

tileHeight

protected final int tileHeight

The number of rows in the raster.

tileWidth

protected final int tileWidth

The number of elevation values in a row of the raster.

Constructor Detail

LocalTile

protected LocalTile(Sector sector,
                    double missingDataFlag,
                    int tileWidth,
                    int tileHeight,
                    BufferWrapper elevations,
                    java.lang.Double minEl,
                    java.lang.Double maxEl)

Constructs a new elevations tile.

Parameters:

sector - the sector the tile covers.

missingDataFlag - the elevation model's missing data flag.

tileWidth - the number of elevation values in a row of this tile's elevation raster.

tileHeight - the number of rows in this tile's elevation raster.

elevations - the elevations.

minEl - the minimum elevation of this tile. May be null, in which case the minimum is determined.

maxEl - the maximum elevation of this tile. May be null, in which case the maximum is determined.

Method Detail

computeMinMaxElevations

protected void computeMinMaxElevations()

Determines the minimum and maximum elevations of this tile.

isMissingData

protected boolean isMissingData(double value)

Determines whether a value signifies missing data -- voids. This method not only tests the value againsy the tile's missing data flag, it also tests for its being within range of the tile's minimum and maximum values. The values also tested for the magic value -32767, which for some reason is commonly used but not always identified in GeoTiff files.

Parameters:

value - the value to test.

Returns:

true if the value is this tile's missing data signal, or if it is outside the min/max range of the tile, or if it's equal to -32767.