示例#1
0
  /**
   * Write a ucar.nc2.ft.PointFeatureCollection in CF point format.
   *
   * @param pfDataset find the first PointFeatureCollection, and write all data from it
   * @param fileOut write to this netcdf-3 file
   * @return number of records written
   * @throws IOException on read/write error, or if no PointFeatureCollection in pfDataset
   */
  public static int writePointFeatureCollection(FeatureDatasetPoint pfDataset, String fileOut)
      throws IOException {
    // extract the PointFeatureCollection
    PointFeatureCollection pointFeatureCollection = null;
    List<FeatureCollection> featureCollectionList = pfDataset.getPointFeatureCollectionList();
    for (FeatureCollection featureCollection : featureCollectionList) {
      if (featureCollection instanceof PointFeatureCollection)
        pointFeatureCollection = (PointFeatureCollection) featureCollection;
    }
    if (null == pointFeatureCollection)
      throw new IOException("There is no PointFeatureCollection in  " + pfDataset.getLocation());

    long start = System.currentTimeMillis();

    FileOutputStream fos = new FileOutputStream(fileOut);
    DataOutputStream out = new DataOutputStream(new BufferedOutputStream(fos, 10000));
    WriterCFPointDataset writer = null;

    /* LOOK BAD
    List<VariableSimpleIF> dataVars = new ArrayList<VariableSimpleIF>();
    ucar.nc2.NetcdfFile ncfile = pfDataset.getNetcdfFile();
    if ((ncfile == null) || !(ncfile instanceof NetcdfDataset))  {
      dataVars.addAll(pfDataset.getDataVariables());
    } else {
      NetcdfDataset ncd = (NetcdfDataset) ncfile;
      for (VariableSimpleIF vs : pfDataset.getDataVariables()) {
        if (ncd.findCoordinateAxis(vs.getName()) == null)
          dataVars.add(vs);
      }
    } */

    int count = 0;
    pointFeatureCollection.resetIteration();
    while (pointFeatureCollection.hasNext()) {
      PointFeature pointFeature = (PointFeature) pointFeatureCollection.next();
      StructureData data = pointFeature.getData();
      if (count == 0) {
        EarthLocation loc =
            pointFeature.getLocation(); // LOOK we dont know this until we see the obs
        String altUnits =
            Double.isNaN(loc.getAltitude()) ? null : "meters"; // LOOK units may be wrong
        writer = new WriterCFPointDataset(out, pfDataset.getGlobalAttributes(), altUnits);
        writer.writeHeader(pfDataset.getDataVariables(), -1);
      }
      writer.writeRecord(pointFeature, data);
      count++;
    }

    writer.finish();
    out.flush();
    out.close();

    long took = System.currentTimeMillis() - start;
    System.out.printf(
        "Write %d records from %s to %s took %d msecs %n",
        count, pfDataset.getLocation(), fileOut, took);
    return count;
  }
  private boolean filter(PointFeature pdata) {
    if ((filter_date != null) && !filter_date.included(pdata.getObservationTimeAsDate()))
      return false;

    if ((filter_bb != null)
        && !filter_bb.contains(
            pdata.getLocation().getLatitude(), pdata.getLocation().getLongitude())) return false;

    return true;
  }
  public void writeObsData(PointFeature pf) throws IOException {

    StructureDataScalar coords = new StructureDataScalar("Coords");
    if (useAlt)
      coords.addMember(
          altitudeCoordinateName,
          null,
          null,
          DataType.DOUBLE,
          false,
          pf.getLocation().getAltitude());

    StructureDataComposite sdall = new StructureDataComposite();
    sdall.add(coords); // coords first so it takes precedence
    sdall.add(pf.getFeatureData());

    obsRecno = super.writeStructureData(obsRecno, record, sdall, dataMap);
  }
  private void writeHeader(ProfileFeature profile, PointFeature obs) throws IOException {

    Formatter coordNames = new Formatter().format("%s %s %s", profileTimeName, latName, lonName);
    List<VariableSimpleIF> coords = new ArrayList<>();
    if (useAlt) {
      coords.add(
          VariableSimpleImpl.makeScalar(
                  altitudeCoordinateName, "obs altitude", altUnits, DataType.DOUBLE)
              .add(new Attribute(CF.STANDARD_NAME, "altitude"))
              .add(
                  new Attribute(
                      CF.POSITIVE,
                      CF1Convention.getZisPositive(altitudeCoordinateName, altUnits))));
      coordNames.format(" %s", altitudeCoordinateName);
    }

    super.writeHeader(
        coords, profile.getFeatureData(), obs.getFeatureData(), coordNames.toString());
  }