[netcdf-java] Using the GridDataset to get start/end date

• To: netcdf-java@xxxxxxxxxxxxxxxx
• Subject: [netcdf-java] Using the GridDataset to get start/end date
• From: David Neufeld <David.Neufeld@xxxxxxxx>
• Date: Thu, 10 Jun 2010 07:41:49 -0600

Hi All,

Thanks for your suggestions.

Dave

package gov.noaa.eds.threddsutilities.util;

import java.util.List;

import org.junit.Test;

import ucar.nc2.constants.AxisType;
import ucar.nc2.dataset.CoordinateAxis;
import ucar.nc2.dataset.NetcdfDataset;
import ucar.nc2.dt.TypedDatasetFactory;
import ucar.nc2.dt.grid.GridDataset;
import static org.junit.Assert.*;

public class ThreddsExtentUtilTest {

    @Test
    public void gdsTest() {
        String urlStr = 
"http://edac-dap.northerngulfinstitute.org/thredds/dodsC/ncom_reg1_agg/NCOM_Region_1_Aggregation_fmrc.ncd";;
     
        try {
            NetcdfDataset ncd = NetcdfDataset.openDataset(urlStr); 
            List<CoordinateAxis> coordAxes = ncd.getCoordinateAxes();
            StringBuilder errlog = new StringBuilder();
            GridDataset gds = 
(GridDataset)TypedDatasetFactory.open(ucar.nc2.constants.FeatureType.GRID, ncd, 
null, errlog);          

            for (CoordinateAxis coordAxis : coordAxes) { 
                if (coordAxis.getAxisType()==AxisType.Lat) {
                        System.out.println("GridDataset minLat=" + 
gds.getBoundingBox().getLatMin());
                        System.out.println("GridDataset maxLat=" + 
gds.getBoundingBox().getLatMax());
                        System.out.println("CoordAxis minLat=" + 
Double.toString(coordAxis.getMaxValue()));
                        System.out.println("CoordAxis maxLat=" + 
Double.toString(coordAxis.getMaxValue()));
                }
                if (coordAxis.getAxisType()==AxisType.Time) {
                        if (gds.getStartDate()!=null) { //Ideal if we can get a 
Date object                                     
                          System.out.println("GridDataset startTime=" + 
gds.getStartDate().toGMTString());
                        } else {
                                  System.out.println("GridDataset 
startTime=null");                               
                        }
                        if (gds.getEndDate()!=null) { //Ideal if we can get a 
Date object                               
                          System.out.println("GridDataset endTime=" + 
gds.getEndDate().toGMTString());
                        } else {
                                  System.out.println("GridDataset 
endTime=null");                                 
                        }                       
                        System.out.println("CoordAxis startTime=" + 
Double.toString(coordAxis.getMinValue()));
                        System.out.println("CoordAxis endTime=" + 
Double.toString(coordAxis.getMaxValue()));
                }
            }
                } catch (Exception e) {
                        e.printStackTrace();
                }       
        
    }
    
}

• Follow-Ups:
  • Re: [netcdf-java] Using the GridDataset to get start/end date
    • From: John Caron