Hi all,
i recently have started to looking into reading grib1 and grib2 files
using the netcdf java library and need to extract the variables in the
file along with their relative data. i have some code here:
public class GribPlugin {
GribChecker file = new GribChecker();
Grib1GridDefinitionSection gridSection;
Grib1Input gribInput;
Grib1ProductDefinitionSection productSection;
Grib2ExtractRawData extract;
ArrayList<String> gribRecords;
ArrayList<String> gribProducts;
String testfile = "Pacific.wind.grb";
static int type;
public GribPlugin() throws IOException, NoValidGribException,
NotSupportedException{
ucar.unidata.io.RandomAccessFile gribfile = new
ucar.unidata.io.RandomAccessFile(testfile, "rw");
type = file.getEdition(gribfile);
System.out.println("File read in: " + testfile + ", Type of Grib
File is " + type);
gribInput = new Grib1Input(gribfile);
gribRecords = new ArrayList<String>();
gribProducts = new ArrayList<String>();
gribRecords = gribInput.getRecords();
gribProducts = gribInput.getProducts();
//extract = new Grib2ExtractRawData(gribfile);
//gribRecords = extract.getRecords();
//gribProducts = extract.getProducts();
System.out.println("number of grib records: " +
gribRecords.size());
System.out.println("number of grib products: " +
gribProducts.size());
//System.out.println(gridSection.getNx() + " " +
gridSection.getNy());
//System.out.println("First lat coordinate: " + gridSection.getLa1()
+ " Last lat coordinate: " + gridSection.getLa2());
//System.out.println("First lon coordinate: " + gridSection.getLo1()
+ " Last lon coordinate: " + gridSection.getLo2());
}
a printout of this code with this particular file yields:
File read in: Pacific.wind.grb, Type of Grib File is 1
number of grib records: 0
number of grib products: 0
I guess i don't know what i am looking for to get the data and am not
as familiar with this type of data as i should be. I guess i need to
read up on what "records" or "products" really are but i was wondering
if there was any examples hidden somewhere in some javadoc from the
netcdf java website??
thanks all for the help and suggestions!
Chad
