Examples of NetcdfDataset

ucar.nc2.dataset.NetcdfDataset
NetcdfDataset extends the netCDF API, adding standard attribute parsing such as scale and offset, and explicit support for Coordinate Systems. A NetcdfDataset wraps a NetcdfFile, or is defined by an NcML document.

Be sure to close the dataset when done, best practice is to enclose in a try/finally block:
```
 NetcdfDataset ncd = null; try { ncd = NetcdfDataset.openDataset(fileName); ... } finally { ncd.close(); } 
```
By default NetcdfDataset is opened with all enhancements turned on. The default "enhance mode" can be set through setDefaultEnhanceMode(). One can also explicitly set the enhancements you want in the dataset factory methods. The enhancements are:
- ScaleMissing : process scale/offset/missing attributes, and automatically convert the data.
- ScaleMissingDefer : process scale/offset/missing attributes, but dont automatically convert the data. You can call VariableEnhanced.convertScaleOffsetMissing() on the data manually.
- CoordSystem : extract CoordinateSystem using the CoordSysBuilder plug-in mechanism
- ConvertEnums : automaticlly convert enum values to their corresponding Strings. If you want to do this manually, you can call Variable.lookupEnumString() manually.
Automatic ScaleMissing processing has some overhead, and if you need maximum performance, but still want to use scale/offset/missing value handling, open the NetcdfDataset with ScaleMissingDefer. The VariableDS data type is not promoted, and the data is not converted on a read, but you can call the convertScaleOffsetMissing() routines which will do the conversion on a point-by-point basis. @author caron @see ucar.nc2.NetcdfFile

Examples of ucar.nc2.dataset.NetcdfDataset


  }




  public void testDatasetAddRecord() throws InvalidRangeException, IOException {
    NetcdfDataset nc = NetcdfDataset.openDataset(TestLocal.cdmTestDataDir + "testWriteRecord.nc", NetcdfDataset.getDefaultEnhanceMode(),
        -1, null, NetcdfFile.IOSP_MESSAGE_ADD_RECORD_STRUCTURE);


    // record variable
    Variable record = nc.findVariable("record");
    assert record instanceof StructureDS;
    StructureDS rs = (StructureDS) record;
    assert rs.getRank() == 1;
    assert rs.getDimension(0).getLength() == 2;


    /* Read a record */
    Array rsValues = rs.read("1:1:2");
    assert (rsValues instanceof ArrayStructure);
    assert rsValues.getRank() == 1;
    assert rsValues.getShape()[0] == 1;


    StructureData sdata = (StructureData) rsValues.getObject(rsValues.getIndex());
    Array gdata = sdata.getArray("time");
    assert gdata instanceof ArrayInt.D0 : gdata.getClass().getName();
    ArrayInt.D0 tdata = (ArrayInt.D0) gdata;
    int t = tdata.get();
    assert t == 18;


    int t2 = sdata.getScalarInt("time");
    assert t2 == 18;


    /* Read the times: unlimited dimension */
    Variable time = rs.findVariable("time");
    assert time != null;
    Array timeValues = time.read();
    assert (timeValues instanceof ArrayInt.D0);
    ArrayInt.D0 ta = (ArrayInt.D0) timeValues;
    assert (ta.get() == 6) : ta.get();


    nc.close();
  }

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Examples of ucar.nc2.dataset.NetcdfDataset


    nc.close();
  }


  public void testDatasetAddRecordAfter() throws InvalidRangeException, IOException {
    NetcdfDataset nc = NetcdfDataset.openDataset(TestLocal.cdmTestDataDir + "testWriteRecord.nc");
    assert (Boolean) nc.sendIospMessage(NetcdfFile.IOSP_MESSAGE_ADD_RECORD_STRUCTURE);


    // record variable
    Variable record = nc.findVariable("record");
    assert record instanceof StructureDS;
    StructureDS rs = (StructureDS) record;
    assert rs.getRank() == 1;
    assert rs.getDimension(0).getLength() == 2;


    /* Read a record */
    Array rsValues = rs.read("1:1:2");
    assert (rsValues instanceof ArrayStructure);
    assert rsValues.getRank() == 1;
    assert rsValues.getShape()[0] == 1;


    StructureData sdata = (StructureData) rsValues.getObject(rsValues.getIndex());
    Array gdata = sdata.getArray("time");
    assert gdata instanceof ArrayInt.D0 : gdata.getClass().getName();
    ArrayInt.D0 tdata = (ArrayInt.D0) gdata;
    int t = tdata.get();
    assert t == 18;


    int t2 = sdata.getScalarInt("time");
    assert t2 == 18;


    /* Read the times: unlimited dimension */
    Variable time = rs.findVariable("time");
    Array timeValues = time.read();
    assert (timeValues instanceof ArrayInt.D0);
    ArrayInt.D0 ta = (ArrayInt.D0) timeValues;
    assert (ta.get() == 6) : ta.get();


    nc.close();
  }

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Examples of ucar.nc2.dataset.NetcdfDataset

      System.out.printf("errlog= %s%n", errlog.toString());
      return;
    }


    ucar.nc2.dt.GridDataset gridDs = fmrc.getDataset2D(null);
    NetcdfDataset ncd = (NetcdfDataset) gridDs.getNetcdfFile();


    int countGrids = gridDs.getGrids().size();
    int countCoordAxes = ncd.getCoordinateAxes().size();
    int countCoordSys = ncd.getCoordinateSystems().size();


    // count vertical axes
    int countVertCooordAxes = 0;
    List axes = ncd.getCoordinateAxes();
    for (int i = 0; i < axes.size(); i++) {
      CoordinateAxis axis =  (CoordinateAxis) axes.get(i);
      AxisType t = axis.getAxisType();
      if ((t == AxisType.GeoZ) || (t == AxisType.Height) || (t == AxisType.Pressure) )
        countVertCooordAxes++;

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Examples of ucar.nc2.dataset.NetcdfDataset

      System.out.printf("errlog= %s%n", errlog.toString());
      return;
    }


    ucar.nc2.dt.GridDataset gridDs = fmrc.getDatasetBest();
    NetcdfDataset ncd = (NetcdfDataset) gridDs.getNetcdfFile();


    int countGrids = gridDs.getGrids().size();
    int countCoordAxes = ncd.getCoordinateAxes().size();
    int countCoordSys = ncd.getCoordinateSystems().size();


    // count vertical axes
    int countVertCooordAxes = 0;
    List axes = ncd.getCoordinateAxes();
    for (int i = 0; i < axes.size(); i++) {
      CoordinateAxis axis =  (CoordinateAxis) axes.get(i);
      AxisType t = axis.getAxisType();
      if ((t == AxisType.GeoZ) || (t == AxisType.Height) || (t == AxisType.Pressure) )
        countVertCooordAxes++;

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Examples of ucar.nc2.dataset.NetcdfDataset

    }


    public Bean(File f) {
      this.f = f;


      NetcdfDataset ds = null;
      try {
        if (debug) System.out.printf(" featureScan=%s%n", f.getPath());
        ds = NetcdfDataset.openDataset(f.getPath());
        fileType = ds.getFileTypeId();
        setCoordMap(ds.getCoordinateSystems());


        Formatter errlog = new Formatter();
        try {
          FeatureDataset featureDataset = FeatureDatasetFactoryManager.wrap(null, ds, null, errlog);
          if (featureDataset != null) {
            featureType = featureDataset.getFeatureType();
            if (featureType != null)
              ftype = featureType.toString();
            ftImpl = featureDataset.getImplementationName();
            Formatter infof = new Formatter();
            featureDataset.getDetailInfo(infof);
            info = infof.toString();
          } else {
            ftype = "FAIL: " + errlog.toString();
          }
        } catch (Throwable t) {
          ftype = "ERR: " + t.getMessage();
          info = errlog.toString();
          problem = t;
        }


      } catch (Throwable t) {
        fileType = "ERR: " + t.getMessage();
        problem = t;


      } finally {
        if (ds != null) try {
          ds.close();
        } catch (IOException ioe) {
        }
      }
    }

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Examples of ucar.nc2.dataset.NetcdfDataset

  public void testRemove() throws IOException, InvalidRangeException {
    try {
      String inName = TestLocal.cdmTestDataDir + "testWrite.nc";
      String outName = TestLocal.temporaryDataDir + "testRemove.nc";


      NetcdfDataset ncd = NetcdfDataset.acquireDataset(inName, null);
      System.out.println(ncd);
      System.out.println(ncd.removeVariable(null, "temperature"));
      System.out.println(ncd);


      ncd.finish();


      NetcdfFile ncdnew = ucar.nc2.FileWriter.writeToFile(ncd, outName, true);
      ncdnew.close();
      ncd.close();


      NetcdfDataset ncdnew2 = NetcdfDataset.acquireDataset(outName, null);
      assert ncdnew2.findVariable("temperature") == null;
      ncdnew2.close();
      
    } catch (IOException e) {
      e.printStackTrace();
    }

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Examples of ucar.nc2.dataset.NetcdfDataset


  }


  public void utestWarning() throws IOException {
    String org = "C:/tmp/example.nc";
    NetcdfDataset dds = NetcdfDataset.openDataset(org);
    FileWriter.writeToFile(dds, "C:/tmp/testOut.nc", true);
    dds.close();
  }

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Examples of ucar.nc2.dataset.NetcdfDataset

  }


  public void utestBufrEnhanced() throws IOException, InvalidRangeException {
    //String fileIn = "C:/data/bufr/edition3/ecmwf/synop.bufr";
    String fileIn = TestAll.cdmUnitTestDir +"bufr/edition3/ecmwf/synop.bufr";
    NetcdfDataset ncf = NetcdfDataset.openDataset(fileIn);
    System.out.println(ncf.toString());


    Structure s = (Structure) ncf.findVariable(BufrIosp.obsRecord);
    Array data = s.read();
    test.testArrayStructure( (ArrayStructure) data);


    Array data2 = s.read(new Section().appendRange(1,3));
    assert data2.getSize() == 3;

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Examples of ucar.nc2.dataset.NetcdfDataset

      String spec = location.substring(CompositeDatasetFactory.SCHEME.length());
      DatasetCollectionManager dcm = DatasetCollectionManager.open(spec, null, errlog);
      return CompositeDatasetFactory.factory(location, wantFeatureType, dcm, errlog);
    }


    NetcdfDataset ncd = NetcdfDataset.acquireDataset(location, task);
    return wrap(wantFeatureType, ncd, task, errlog);
  }

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Examples of ucar.nc2.dataset.NetcdfDataset

    super(name);
  }


  public void testStrings() throws IOException, InvalidRangeException {
    String url = TestLocalDodsServer.testdata+"testWrite.nc";
    NetcdfDataset dodsfile = NetcdfDataset.openDataset(url);
    Variable v = null;


    // string
    assert(null != (v = dodsfile.findVariable("svar")));
    assert v.getFullName().equals("svar");
    assert v.getRank() == 1;
    assert v.getSize() == 80;
    assert v.getDataType() == DataType.CHAR : v.getDataType();


    Array a = v.read();
    assert a.getRank() == 1;
    assert a.getSize() == 80 : a.getSize();
    assert a.getElementType() == DataType.CHAR.getPrimitiveClassType();


    a = v.read("1:10");
    assert a.getRank() == 1;
    assert a.getSize() == 10 : a.getSize();
    assert a.getElementType() == DataType.CHAR.getPrimitiveClassType();


    // string array
    assert(null != (v = dodsfile.findVariable("names")));
    assert v.getFullName().equals("names");
    assert v.getRank() == 2;
    assert v.getSize() == 3 * 80;
    assert v.getDataType() == DataType.CHAR : v.getDataType();

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