EarthElevationModel.java example

Explorer
twiterra-master
/*
Copyright (C) 2001, 2006 United States Government
as represented by the Administrator of the
National Aeronautics and Space Administration.
All Rights Reserved.
*/
package gov.nasa.worldwind.globes;

import gov.nasa.worldwind.avlist.*;
import gov.nasa.worldwind.geom.*;
import gov.nasa.worldwind.util.LevelSet;
import gov.nasa.worldwind.Configuration;

/**
 * @author Tom Gaskins
 * @version $Id: EarthElevationModel.java 2664 2007-08-23 22:17:25Z tgaskins $
 */
public class EarthElevationModel extends BasicElevationModel
{
    private static double HEIGHT_OF_MT_EVEREST = 8850d; // meters
    private static double DEPTH_OF_MARIANAS_TRENCH = -11000d; // meters

    public EarthElevationModel()
    {
        super(makeLevels(), DEPTH_OF_MARIANAS_TRENCH, HEIGHT_OF_MT_EVEREST);
        this.setNumExpectedValuesPerTile(22500);
        String extremesFileName =
            Configuration.getStringValue("gov.nasa.worldwind.avkey.ExtremeElevations.SRTM30Plus.FileName");
        if (extremesFileName != null)
            this.loadExtremeElevations(extremesFileName);
    }

    private static LevelSet makeLevels()
    {
        AVList params = new AVListImpl();

        params.setValue(AVKey.TILE_WIDTH, 150);
        params.setValue(AVKey.TILE_HEIGHT, 150);
        params.setValue(AVKey.DATA_CACHE_NAME, "Earth/srtm30pluszip");
        params.setValue(AVKey.SERVICE, "http://worldwind25.arc.nasa.gov/wwelevation/wwelevation.aspx");
        params.setValue(AVKey.DATASET_NAME, "srtm30pluszip");
        params.setValue(AVKey.FORMAT_SUFFIX, ".bil");
        params.setValue(AVKey.NUM_LEVELS, 10);
        params.setValue(AVKey.NUM_EMPTY_LEVELS, 0);
        params.setValue(AVKey.LEVEL_ZERO_TILE_DELTA, new LatLon(Angle.fromDegrees(20d), Angle.fromDegrees(20d)));
        params.setValue(AVKey.SECTOR, Sector.FULL_SPHERE);
        params.setValue(AVKey.SECTOR_RESOLUTION_LIMITS, new LevelSet.SectorResolution[]
            {
                new LevelSet.SectorResolution(Sector.fromDegrees(24, 50, -125, -66.8), 9), // CONUS
                new LevelSet.SectorResolution(Sector.fromDegrees(18.5, 22.5, -160.5, -154.5), 9), // HI
                new LevelSet.SectorResolution(Sector.fromDegrees(17.8, 18.7, -67.4, -64.5), 9), // PR, VI
                new LevelSet.SectorResolution(Sector.fromDegrees(48, 108, -179.9, -128), 9), // AK
                new LevelSet.SectorResolution(Sector.fromDegrees(-54, 60, -180, 180), 8), // SRTM3
                new LevelSet.SectorResolution(Sector.FULL_SPHERE, 4) // SRTM30Plus
            });

        return new LevelSet(params);
    }
}