Examples of ucar.nc2.dt.grid.GeoGrid

ucar.nc2.dt.grid.GeoGrid
A georeferencing "gridded" VariableEnhanced, that has a GridCoordSys. In VisAD data model, it is a sampled Field. The dimension are put into canonical order: (rt, e, t, z, y, x).

Implementation note: If the Horizontal axes are 2D, the x and y dimensions are arbitrarily chosen to be gcs.getXHorizAxis().getDimension(1), gcs.getXHorizAxis().getDimension(0) respectively.
@author caron

          }


        } else if (elem.getName().equals("typedDatasetFactory")) {
          String typeName = elem.getAttributeValue("datatype");
          String className = elem.getAttributeValue("class");
          FeatureType datatype = FeatureType.valueOf(typeName.toUpperCase());
          if (null == datatype) {
            errlog.append("TypedDatasetFactory "+className+" unknown datatype= "+typeName+"\n");
            continue;
          }

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    SimpleDateFormat format = new SimpleDateFormat("ddMMMyyyyHHmm");
    format.setTimeZone(java.util.TimeZone.getTimeZone("GMT"));
    try {
      Date d = format.parse(dateS+timeS);
      VariableDS time = new VariableDS(ds, vhrr, null, "time", DataType.LONG, "",
          "seconds since 1970-01-01 00:00", "time generated from PRODUCT_METADATA/PRODUCT_DETAILS");


      time.addAttribute( new Attribute(_Coordinate.AxisType, AxisType.Time.toString())); // // LOOK : cant handle scalar coordinates yet ??
      time.addAttribute( new Attribute("IsoDate", new DateFormatter().toDateTimeStringISO(d)));
      ds.addVariable(vhrr, time);
      ArrayLong.D0 timeData = new ArrayLong.D0();
      timeData.set(d.getTime() / 1000);
      time.setCachedData(timeData, true);


    } catch (ParseException e) {
      e.printStackTrace();
      throw new IOException(e.getMessage());
    }

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    // attributes
    checkAll( org.getAttributes(), copy.getAttributes());


    // coord sys
    if ((org instanceof VariableEnhanced) && (copy instanceof VariableEnhanced) ) {
      VariableEnhanced orge = (VariableEnhanced) org;
      VariableEnhanced copye = (VariableEnhanced) copy;
      checkAll( orge.getCoordinateSystems(), copye.getCoordinateSystems());
    }


    // data !!
    if (compareData) {
      try {

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    // attributes
    ok &= checkAll(org.getAttributes(), copy.getAttributes(), null);


    // coord sys
    if ((org instanceof VariableEnhanced) && (copy instanceof VariableEnhanced)) {
      VariableEnhanced orge = (VariableEnhanced) org;
      VariableEnhanced copye = (VariableEnhanced) copy;
      ok &= checkAll(orge.getCoordinateSystems(), copye.getCoordinateSystems(), null);
    }


    // data !!
    if (compareData) {
      try {

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  private VerticalCT makeWRFEtaVerticalCoordinateTransform(NetcdfDataset ds, CoordinateSystem cs) {
    if ((null == ds.findVariable("PH")) || (null == ds.findVariable("PHB")) ||
        (null == ds.findVariable("P")) || (null == ds.findVariable("PB")))
      return null;


    WRFEtaTransformBuilder builder = new WRFEtaTransformBuilder(cs);
    return (VerticalCT) builder.makeCoordinateTransform(ds, null);
  }

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  }
*/


  static private NetcdfFile acquireDODS(FileCache cache, FileFactory factory, Object hashKey,
                                        String location, int buffer_size, ucar.nc2.util.CancelTask cancelTask, Object spiObject) throws IOException {
    if (cache == null) return new DODSNetcdfFile(location, cancelTask);


    if (factory == null) factory = new DodsFactory();
    return (NetcdfFile) cache.acquire(factory, hashKey, location, buffer_size, cancelTask, spiObject);
  }

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    return (NetcdfFile) cache.acquire(factory, hashKey, location, buffer_size, cancelTask, spiObject);
  }


  static private class DodsFactory implements FileFactory {
    public NetcdfFile open(String location, int buffer_size, ucar.nc2.util.CancelTask cancelTask, Object spiObject) throws IOException {
      return new DODSNetcdfFile(location, cancelTask);
    }

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public class ReadGrid {


  public static void read( String filename) throws IOException {


    GridDataset gds = GridDataset.open (filename);
    GeoGrid grid = gds.findGridByName("Temperature");


    long startTime = System.currentTimeMillis();


    Array data = grid.readDataSlice(0, -1, -1, -1);


    long endTime = System.currentTimeMillis();
    long diff = endTime - startTime;
    System.out.println("read "+data.getSize()+"  took "+diff+ " msecs");

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    String defaultFilename = "R:/testdata/grid/grib/grib2/test/NAM_CONUS_12km_20060305_1200.grib2";
    String filename = (arg.length > 0) ? arg[0] : defaultFilename;
    try {
      long start = System.currentTimeMillis();
      GridDataset gridDs = GridDataset.open (filename);
      GeoGrid gg = gridDs.findGridByName("Temperature");
      long took = System.currentTimeMillis() - start;
      System.out.println("open took = " + took+" msecs");


      start = System.currentTimeMillis();
      Array data = gg.readVolumeData(0);
      took = System.currentTimeMillis() - start;
      float size = (float) data.getSize() * gg.getDataType().getSize() / (1000 * 1000);
      System.out.println(size+" Mbytes, took = " + took+" msecs");


    } catch (Exception ioe) {
      ioe.printStackTrace();
    }

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  }


  public void utestMargolis() throws IOException, InvalidRangeException {
    String dataDir = TestAll.cdmUnitTestDir + "nomads/gfs-hi/";
    GridDataset gridDataset = GridDataset.open( "D:/AStest/margolis/grib2ncdf.ncml" );
    GeoGrid grid = gridDataset.findGridByName( "Turbulence_SIGMET_AIRMET" );
    System.out.println("Grid= "+grid+" section="+ new Section(grid.getShape()));
    System.out.println(" coordSys= "+grid.getCoordinateSystem());


    GeoGrid subset = (GeoGrid) grid.makeSubset(new Range(0, 0), null, new Range(1,1), null, null, null);
    System.out.println("subset= "+subset+" section="+ new Section(subset.getShape()));
    System.out.println(" coordSys= "+subset.getCoordinateSystem());


    gridDataset.close();
  }

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