Package gov.nasa.worldwind.terrain

Class 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 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 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

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method 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, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • sector

        protected final Sector sector
        The sector the tile covers.

      • tileWidth

        protected final int tileWidth
        The number of elevation values in a row of the raster.

      • tileHeight

        protected final int tileHeight
        The number of rows in the raster.

      • minElevation

        protected double minElevation
        The minimum elevation contained in this tile's raster.

      • maxElevation

        protected double maxElevation
        The maximum elevation contained in this tile's raster.

      • missingDataFlag

        protected final double missingDataFlag
        The elevation model's missing data flag.

      • elevations

        protected final BufferWrapper elevations
        The elevations.

    • 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.