[GEMPAK #UGL-929049]: gem to netcdf

Hi Akhilesh,

We have a Java API that will read in a GEMPAK grid file and output a netCDF 
file using CF conventions.

It's the netCDF-Java library available at:

http://www.unidata.ucar.edu/software/netcdf-java

The gempak file reading is part of the netCDF-Java library in the 
ucar.nc2.iosp.gempak package. The writing is in the ucar.nc2.dt.grid package.

I've attached a sample program that will read a gem file and write it out as 
netCDF.

You may need to download the netcdfAll-4.0.jar from this link:

ftp://ftp.unidata.ucar.edu/pub/netcdf-java/v4.0/netcdfAll-4.0.jar

then run the program as:

java -Xmx512m -classpath netcdfAll-4.0.jar;. GempakToCF GEM_FILE.gem 
NETCDF_FILE.nc

the netcdfAll jar file has all the libraries you need contained in it.


Michael



> Dear GemPak Users and support group,
> I was wondering if there is any tool/script available to convert the model
> forecasts format (from .gem to netcdf or binary format).
> I am new user and i just installed GemPak to Linux 64 bit (CentOS) machine.
> Looking forward to hear from the group.
> Best wishes and Regards
> Akhilesh
> 
> 


Ticket Details
===================
Ticket ID: UGL-929049
Department: Support GEMPAK
Priority: Normal
Status: Open

import ucar.nc2.dt.grid.*;
import java.util.List;
import java.util.ArrayList;

public class GempakToCF {

    public static void main(String[] args) throws Exception {
        if (args.length < 2) {
            System.out.println("You must supply an input and output file name");
            System.exit(1);
        }
        String input = args[0];
        String output = args[1];
        GridDataset gds = GridDataset.open(input);
        List grids = gds.getGrids();
        List names = new ArrayList(grids.size());
        for (int i=0; i<grids.size(); i++) {
            names.add(((GeoGrid) grids.get(i)).getName());
        }
        NetcdfCFWriter writer = new NetcdfCFWriter();
        writer.makeFile(output, gds, names, null, null, false, 1, 1, 1);
    }
             

}