Examples of ucar.nc2.dt.grid.GeoGrid

ucar.nc2.iosp.IOServiceProvider
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

    CoordinateAxis axis = (CoordinateAxis) v;
    assert axis.getAxisType() == AxisType.Time;
    
    GridDataset gd = new GridDataset(ncd, null);


    GeoGrid grid = (GeoGrid) gd.findGridByName("rh");
    assert grid != null;
    assert grid.getDataType() == DataType.INT;
    System.out.printf("%s%n", ncd);


    ncfile.close();
  }

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    ds.close();
  }


  public void testCF() throws IOException {
    GridDataset ds = GridDataset.open(TestAll.cdmUnitTestDir + "conventions/cf/twoGridMaps.nc");
    GeoGrid grid = ds.findGridByName("altitude");
    GridCoordSystem gcs = grid.getCoordinateSystem();
    assert 1 == gcs.getCoordinateTransforms().size();
    CoordinateTransform ct = gcs.getCoordinateTransforms().get(0);
    assert ct.getTransformType() == TransformType.Projection;
    assert ct.getName().equals("projection_stere");
    ds.close();

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  public void testErie() throws IOException, InvalidRangeException {
    String uri = "C:\\data\\work\\signell/erie_test.ncml";
    String var = "temp";


    GridDataset ds = GridDataset.open(uri);
    GeoGrid grid = ds.findGridByName(var);
    Section s = new Section(grid.getShape());
    System.out.printf("var = %s %n", s);


    GridCoordSystem gcs = grid.getCoordinateSystem();
    VerticalTransform vt = gcs.getVerticalTransform();
    ArrayDouble.D3 z = vt.getCoordinateArray(0);
    Section sv = new Section(z.getShape());
    System.out.printf("3dcoord = %s %n", sv);

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  }


  public void testSubset() throws Exception {
    ucar.nc2.dt.grid.GridDataset dataset = GridDataset.open(TestGrid.topDir+"rankTest.nc");


    GeoGrid grid = dataset.findGridByName("full4");
    assert null != grid;
    GridCoordSystem gcs = grid.getCoordinateSystem();
    assert null != gcs;
    assert grid.getRank() == 4;


    doRead4(grid);


    GeoGrid grid_section = grid.subset(null, new Range(0,3,2), null, null);
    GridCoordSystem gcs_section = grid_section.getCoordinateSystem();
    CoordinateAxis zaxis = gcs_section.getVerticalAxis();
    assert zaxis.getSize() == 2;


    assert gcs_section.getXHorizAxis().equals( gcs.getXHorizAxis());
    assert gcs_section.getYHorizAxis().equals( gcs.getYHorizAxis());
    assert gcs_section.getTimeAxis().equals( gcs.getTimeAxis());


    Array data = grid_section.readDataSlice(-1, -1, -1, -1);
    NCdump.printArray( data, "grid_section", System.out,  null);


    dataset.close();
  }

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  }


  public void utestAxisId() throws IOException {
    ucar.nc2.dt.grid.GridDataset dataset = GridDataset.open("C:/data/20100314_v_000000_l_0118800.nc");


    GeoGrid grid = dataset.findGridByName("wind_speed");
    assert null != grid;
    GridCoordSystem gcs = grid.getCoordinateSystem();
    assert null != gcs;
    assert grid.getRank() == 3;


    CoordinateAxis axis = gcs.getXHorizAxis();
    assert axis != null;
    assert axis.getShortName().equals("x") : axis.getShortName();

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  private void testGrid(String uri, String var) throws IOException, InvalidRangeException {


    GridDataset ds = null;
    try {
      ds = GridDataset.open(uri);
      GeoGrid grid = ds.findGridByName(var);
      Section s = new Section(grid.getShape());
      System.out.printf("var = %s %n", s);


      GridCoordSystem GridCoordS = grid.getCoordinateSystem();
      VerticalTransform vt = GridCoordS.getVerticalTransform();
      ArrayDouble.D3 z = vt.getCoordinateArray(0);
      Section sv = new Section(z.getShape());
      System.out.printf("3dcoord = %s %n", sv);

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  public GridCoordSys getGridCoordSys(VariableEnhanced ve) {
    List<CoordinateSystem> csList = ve.getCoordinateSystems();
    for (CoordinateSystem cs : csList) {
      if (GridCoordSys.isGridCoordSys(null, cs, ve)) {
        return new GridCoordSys(cs, null);
      }
    }
    return null;
  }

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    List<CoordinateSystem> csList = ds.getCoordinateSystems();
    for (CoordinateSystem cs : csList) {
      Element csElem;
      if (GridCoordSys.isGridCoordSys(null, cs, null)) {
        GridCoordSys gcs = new GridCoordSys(cs, null);
        csElem = new Element("gridCoordSystem");
        csElem.setAttribute("name", cs.getName());
        csElem.setAttribute("horizX", gcs.getXHorizAxis().getFullName());
        csElem.setAttribute("horizY", gcs.getYHorizAxis().getFullName());
        if (gcs.hasVerticalAxis())
          csElem.setAttribute("vertical", gcs.getVerticalAxis().getFullName());
        if (gcs.hasTimeAxis())
          csElem.setAttribute("time", cs.getTaxis().getFullName());
      } else {
        csElem = new Element("coordSystem");
        csElem.setAttribute("name", cs.getName());
      }


      List<CoordinateTransform> coordTransforms = cs.getCoordinateTransforms();
      for (CoordinateTransform ct : coordTransforms) {
        Element ctElem = new Element("coordTransform");
        csElem.addContent(ctElem);
        ctElem.setAttribute("name", ct.getName());
        ctElem.setAttribute("type", ct.getTransformType().toString());
      }


      rootElem.addContent(csElem);
    }


    List<CoordinateTransform> coordTransforms = ds.getCoordinateTransforms();
    for (CoordinateTransform ct : coordTransforms) {
      Element ctElem = new Element("coordTransform");
      rootElem.addContent(ctElem);


      ctElem.setAttribute("name", ct.getName());
      ctElem.setAttribute("type", ct.getTransformType().toString());
      List<Parameter> params = ct.getParameters();
      for (Parameter pp : params) {
        Element ppElem = new Element("param");
        ctElem.addContent(ppElem);
        ppElem.setAttribute("name", pp.getName());
        ppElem.setAttribute("value", pp.getStringValue());
      }
    }


    for (Variable var : ds.getVariables()) {
      VariableEnhanced ve = (VariableEnhanced) var;
      if (ve instanceof CoordinateAxis) continue;
      GridCoordSys gcs = getGridCoordSys(ve);
      if (null != gcs) {
        nDataVariables++;
        Element gridElem = new Element("grid");
        rootElem.addContent(gridElem);


        gridElem.setAttribute("name", ve.getFullName());
        gridElem.setAttribute("decl", getDecl(ve));
        if (ve.getUnitsString() != null) {
          gridElem.setAttribute("units", ve.getUnitsString());
          gridElem.setAttribute("udunits", isUdunits(ve.getUnitsString()));
        }
        gridElem.setAttribute("coordSys", gcs.getName());
      }
    }


    for (Variable var : ds.getVariables()) {
      VariableEnhanced ve =  (VariableEnhanced) var;
      if (ve instanceof CoordinateAxis) continue;
      GridCoordSys gcs = getGridCoordSys(ve);
      if (null == gcs) {
        nOtherVariables++;
        Element elem = new Element("variable");
        rootElem.addContent(elem);

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    try
    {
      File dir = new File( getDiskCache().getRootDirectory() );
      File ncFile = File.createTempFile( "WCS", ".nc", dir );


      NetcdfCFWriter writer = new NetcdfCFWriter();
      writer.makeFile( ncFile.getPath(), dataset,
                       Collections.singletonList( identifier ), null, null,
  //                     Collections.singletonList( req.getCoverage() ),
  //                     req.getBoundingBox(), dateRange,
                       true, 1, 1, 1 );
      return ncFile;

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     * @param args filename
     *
     * @throws IOException  problem reading file
     */
    public static void main(String[] args) throws IOException {
        IOServiceProvider mciosp = new McIDASGridServiceProvider();
        RandomAccessFile  rf     = new RandomAccessFile(args[0], "r", 2048);
        NetcdfFile ncfile = new MakeNetcdfFile(mciosp, rf, args[0], null);
    }

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