Re: [netcdf-java] NetCDF CDM Station question

• To: Tom Kunicki <tkunicki@xxxxxxxx>
• Subject: Re: [netcdf-java] NetCDF CDM Station question
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Thu, 14 Jan 2010 12:52:53 -0700

Hi Tom:

Tom Kunicki wrote:

Hello,

We're just delving into NetCDF Java (4.1) for a project.

Right now I am having trouble pulling out the range variables using 
FeatureDataset. getDataVariables().  In the code sample below the function 
works as expected for the GRID data.  For the STATION data we are getting 
domain variable names (station.latitude, station.longitude, station.altitude, 
etc).   I'm new to NetCDF so please understand that I may be making some silly 
assumptions...

Is the issue that the GRID data is CDM compliant while the STAION data is not?

no, thats not the issue

If so, does anyone have a source of CDM compliant station observation data I 
could pull against?  I did use the CDM validator against the STATION data but 
didn't quite understand the output (was hoping for red/green!)

Thanks,

Tom

+++ START CODE +++
package gov.usgs.cida.netcdf;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Formatter;
import java.util.List;
import ucar.nc2.VariableSimpleIF;
import ucar.nc2.ft.FeatureDataset;
import ucar.nc2.ft.FeatureDatasetFactoryManager;

/**
 *
 * @author tkunicki
 */
public class VariableNameTest {

    public static List<String> getDataVariableNames(String location) throws 
IOException {

        if(location == null) {
            throw new IllegalArgumentException("location can't be null");
        }
        Formatter errorFormatter = new Formatter();
        FeatureDataset dataset = FeatureDatasetFactoryManager.open(
                null, location, null, errorFormatter);

        List<String> variableNames = new ArrayList<String>();
        for (VariableSimpleIF variable : dataset.getDataVariables()) {
            variableNames.add(variable.getName());
        }
        return variableNames;
    }

    public static void main(String[] args) {
        try {
            List<String> list = null;
            // Grid Data
            System.out.println("Example Grid");
            list = 
getDataVariableNames("http://motherlode.ucar.edu:8080/thredds/dodsC/fmrc/NCEP/GFS/Hawaii_160km/NCEP-GFS-Hawaii_160km_fmrc.ncd";);
            for(String name : list) {
                System.out.println("  " + name);
            }
            // Point/Station data
            System.out.println("Example Station");
            list = getDataVariableNames(
                    
"http://motherlode.ucar.edu:8080/thredds/dodsC/station/metar/Surface_METAR_20100114_0000.nc";);
            for(String name : list) {
                System.out.println("  " + name);
            }
        } catch (IOException e) {
            // don't care...
        }
    }
}
+++ START CODE +++


Tom Kunicki
Center for Integrated Data Analytics
U.S. Geological Survey
8505 Research Way
Middleton, WI  53562

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    • From: Tom Kunicki

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  • [netcdf-java] NetCDF CDM Station question
    • From: Tom Kunicki