Hi John,
Yes we are working with Rich Signell.
For this project we will be working against a large number of ThreDDS based
NetCDF sources. For this particular case we were hoping to implement a
generalized solution to provide a user with a drop down list of range variables
for a given FeatureDatasource (currently of FeatureType.GRID or
FeatureType.STATION). This list would have all the domain variables removed.
With the source at
http://motherlode.ucar.edu:8080/thredds/dodsC/station/metar/Surface_METAR_20100114_0000.nc
the domain variables are prefixed with 'station.' while the range variables
are prefixed with 'record.'. Is this a convention that we could use to strip
out domain variables?
Thanks,
Tom.
On Jan 14, 2010, at 1:52 PM, John Caron wrote:
> 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...
>>
> Some people want the coordinates in the list of data variables, so we havent
> tried to hard to remove them. You may want to process that list for your own
> needs. What problem are you trying to solve?
>> 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!)
>>
> I gave some to Rich Signell yesterday. Are you in the group he's working with?
>> 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
>>
>>
>>
>>
>>
>
