public final boolean init(RandomAccessFile raf, boolean fullCheck)
          throws IOException {
    rf = raf;
    raf.order(RandomAccessFile.BIG_ENDIAN);
    return init(fullCheck);
  }
public final boolean init(RandomAccessFile raf, boolean fullCheck)
          throws IOException {
    rf = raf;
    raf.order(RandomAccessFile.BIG_ENDIAN);
    return init(fullCheck);
  }
public final boolean init ( RandomAccessFile raf , boolean fullCheck ) throws IOException { rf = raf ; raf . order ( RandomAccessFile . BIG_ENDIAN ) ; return init ( fullCheck ) ; }
Initialize the file, read in all the metadata (ala DM_OPEN)

@param fullCheck for a full check reading grids
@param raf       RandomAccessFile to read.
@throws IOException problem reading file
Initialize the file read in all the metadata ( ala DM_OPEN )