? DEMReader

????????:
Serializable
??????:
SRTM2Reader, SRTM3Reader

public abstract class DEMReader extends PropertyChangeSupport
DEMReader - an abstract base class for readers of various forms of Digital Elevation Model data sets
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  • ??????

    • in

      protected static ZipInputStream in
    • DIRECTORY

      protected String DIRECTORY
    • cycle

      protected long cycle
    • cache

    • cacheEnable

      protected boolean cacheEnable
    • MAX_CACHE_SIZE

      protected static final int MAX_CACHE_SIZE
      ????:
    • hits

      protected long hits
    • tries

      protected long tries
    • missing

      protected long missing
    • resultcount

      protected long resultcount
    • MISSING

      protected static final double MISSING
      ????:
    • BUFFERLENGTH

      protected static final int BUFFERLENGTH
      ????:
    • lastMessage

      protected String lastMessage
    • download

      protected boolean download
    • lastValue

      protected int lastValue
    • LOCALE

      protected static final Locale LOCALE
    • useLegacy

      protected boolean useLegacy
  • ???????

  • ??????

    • makename

      protected String makename(String ns, double lat, String ew, double lon)
    • getHeight

      public double getHeight(LatLong place) throws MissingDataFileException
      ??:
      MissingDataFileException
    • getRow

      protected DEMReader.CacheEntry getRow(String name, int ytile) throws MissingDataFileException
      ??:
      MissingDataFileException
    • readRecord

      public int[] readRecord() throws IOException
      Read the next record from the current ZipInputStream
      ??:
      int[] buffer of length recordlength() containing the decoded next record;
      ??:
      IOException
    • readByteRecord

      public byte[] readByteRecord() throws IOException
      Read the next byte record from the current ZipInputStream
      ??:
      byte[] buffer of length recordlength() containing the decoded next record;
      ??:
      IOException
    • tile

      public double tile(double x)
      Calculate the number of the element in the buffer that refers to a particular lat or lon value
      ??:
      x - the double lat/lon value
      ??:
      A double value representing the buffer element index
    • getDownloadSiteName

      protected String getDownloadSiteName()
    • frac

      public double frac(int tile)
      Calculate the proportion of a degree represented by a particular element in the buffer
      ??:
      tile - the integer number of the element
      ??:
      double number representing a fraction of a degree
    • downloadFile

      Download a specific file and sand save it in scratch space on the local machine
      ??:
      filename - the name of the file to download
      ??:
      KeyManagementException
      NoSuchAlgorithmException
      IOException
      MissingDataFileException
    • lagrangian

      public static double lagrangian(double x, Point2D.Double... points)
      Fit an exact polynomial to a set of points and return its value at a specified point
      ??:
      x - double the value at which to evaluate the calculated polynomial
      points - a set of java.awt.geom.Point2D.Double values
      ??:
      double value of the polynomial
    • hits

      public long hits()
    • resultcount

      public long resultcount()
    • tries

      public long tries()
    • missing

      public long missing()
    • resetCounts

      public void resetCounts()
    • setMessage

      protected void setMessage(String msg)
    • setProgress

      protected void setProgress(int val)
    • getProperty

      protected String getProperty(TerrainProperties propertyName)
    • setDownload

      public void setDownload(boolean flag)
    • getPropertyChangeListeners

      public PropertyChangeListener[] getPropertyChangeListeners()
      ??:
      getPropertyChangeListeners ??? PropertyChangeSupport
    • datasetName

      public abstract String datasetName()
    • downloadable

      public abstract boolean downloadable()
    • recordlength

      public abstract int recordlength()
    • formatstring

      public abstract String formatstring()
    • extn

      public abstract String extn()
    • littleendian

      public abstract boolean littleendian()
    • missingValue

      public abstract int missingValue()
    • copyright

      public abstract String[] copyright()
    • zipEntryName

      public String zipEntryName(String name)
    • numEntryName

      public String numEntryName(String name)