gov/nasa/worldwind/globes/EarthElevationModel.java

   1 /*
   2 Copyright (C) 2001, 2006 United States Government
   3 as represented by the Administrator of the
   4 National Aeronautics and Space Administration.
   5 All Rights Reserved.
   6 */
   7 package gov.nasa.worldwind.globes;
   8
   9 import gov.nasa.worldwind.avlist.*;
  10 import gov.nasa.worldwind.geom.*;
  11 import gov.nasa.worldwind.util.LevelSet;
  12 import gov.nasa.worldwind.Configuration;
  13
  14 /**
  15  * @author Tom Gaskins
  16  * @version $Id: EarthElevationModel.java 2664 2007-08-23 22:17:25Z tgaskins $
  17  */
  18 public class EarthElevationModel extends BasicElevationModel
  19 {
  20     private static double HEIGHT_OF_MT_EVEREST = 8850d; // meters
  21     private static double DEPTH_OF_MARIANAS_TRENCH = -11000d; // meters
  22
  23     public EarthElevationModel()
  24     {
  25         super(makeLevels(), DEPTH_OF_MARIANAS_TRENCH, HEIGHT_OF_MT_EVEREST);
  26         this.setNumExpectedValuesPerTile(22500);
  27         String extremesFileName =
  28             Configuration.getStringValue("gov.nasa.worldwind.avkey.ExtremeElevations.SRTM30Plus.FileName");
  29         if (extremesFileName != null)
  30             this.loadExtremeElevations(extremesFileName);
  31     }
  32
  33     private static LevelSet makeLevels()
  34     {
  35         AVList params = new AVListImpl();
  36
  37         params.setValue(AVKey.TILE_WIDTH, 150);
  38         params.setValue(AVKey.TILE_HEIGHT, 150);
  39         params.setValue(AVKey.DATA_CACHE_NAME, "Earth/srtm30pluszip");
  40         params.setValue(AVKey.SERVICE, "http://worldwind25.arc.nasa.gov/wwelevation/wwelevation.aspx");
  41         params.setValue(AVKey.DATASET_NAME, "srtm30pluszip");
  42         params.setValue(AVKey.FORMAT_SUFFIX, ".bil");
  43         params.setValue(AVKey.NUM_LEVELS, 10);
  44         params.setValue(AVKey.NUM_EMPTY_LEVELS, 0);
  45         params.setValue(AVKey.LEVEL_ZERO_TILE_DELTA, new LatLon(Angle.fromDegrees(20d), Angle.fromDegrees(20d)));
  46         params.setValue(AVKey.SECTOR, Sector.FULL_SPHERE);
  47         params.setValue(AVKey.SECTOR_RESOLUTION_LIMITS, new LevelSet.SectorResolution[]
  48             {
  49                 new LevelSet.SectorResolution(Sector.fromDegrees(24, 50, -125, -66.8), 9), // CONUS
  50                 new LevelSet.SectorResolution(Sector.fromDegrees(18.5, 22.5, -160.5, -154.5), 9), // HI
  51                 new LevelSet.SectorResolution(Sector.fromDegrees(17.8, 18.7, -67.4, -64.5), 9), // PR, VI
  52                 new LevelSet.SectorResolution(Sector.fromDegrees(48, 108, -179.9, -128), 9), // AK
  53                 new LevelSet.SectorResolution(Sector.fromDegrees(-54, 60, -180, 180), 8), // SRTM3
  54                 new LevelSet.SectorResolution(Sector.FULL_SPHERE, 4) // SRTM30Plus
  55             });
  56
  57         return new LevelSet(params);
  58     }
  59 }