/*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
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package examples;
import ucar.nc2.NetcdfFileWriteable;
import ucar.nc2.Dimension;
import ucar.ma2.DataType;
import ucar.ma2.ArrayFloat;
import ucar.ma2.InvalidRangeException;
import java.util.ArrayList;
import java.io.IOException;
/**
* Created by IntelliJ IDEA.
* User: yuanho
* Date: Nov 16, 2006
* Time: 11:17:44 AM
* To change this template use File | Settings | File Templates.
*/
public class Pres_temp_4D_wr {
public static void main(String args[]) throws Exception
{
final int NLVL = 2;
final int NLAT = 6;
final int NLON = 12;
final int NREC = 2;
final float SAMPLE_PRESSURE = 900.0f;
final float SAMPLE_TEMP = 9.0f;
final float START_LAT = 25.0f;
final float START_LON = -125.0f;
// Create the file.
String filename = "pres_temp_4D.nc";
NetcdfFileWriteable dataFile = null;
try {
// Create new netcdf-3 file with the given filename
dataFile = NetcdfFileWriteable.createNew(filename, false);
//add dimensions where time dimension is unlimit
Dimension lvlDim = dataFile.addDimension("level", NLVL );
Dimension latDim = dataFile.addDimension("latitude", NLAT );
Dimension lonDim = dataFile.addDimension("longitude", NLON );
Dimension timeDim = dataFile.addUnlimitedDimension("time");
ArrayList dims = null;
// Define the coordinate variables.
dataFile.addVariable("latitude", DataType.FLOAT, new Dimension[] {latDim});
dataFile.addVariable("longitude", DataType.FLOAT, new Dimension[] {lonDim});
// Define units attributes for data variables.
dataFile.addVariableAttribute("latitude", "units", "degrees_north");
dataFile.addVariableAttribute("longitude", "units", "degrees_east");
// Define the netCDF variables for the pressure and temperature
// data.
dims = new ArrayList();
dims.add(timeDim);
dims.add(lvlDim);
dims.add(latDim);
dims.add(lonDim);
dataFile.addVariable("pressure", DataType.FLOAT, dims);
dataFile.addVariable("temperature", DataType.FLOAT, dims);
// Define units attributes for data variables.
dataFile.addVariableAttribute("pressure", "units", "hPa");
dataFile.addVariableAttribute("temperature", "units", "celsius");
// Create some pretend data. If this wasn't an example program, we
// would have some real data to write for example, model output.
ArrayFloat.D1 lats = new ArrayFloat.D1(latDim.getLength());
ArrayFloat.D1 lons = new ArrayFloat.D1(lonDim.getLength());
int i,j;
for (i=0; i<latDim.getLength(); i++) {
lats.set(i, START_LAT + 5.f * i );
}
for (j=0; j<lonDim.getLength(); j++) {
lons.set(j, START_LON + 5.f * j);
}
// Create the pretend data. This will write our surface pressure and
// surface temperature data.
ArrayFloat.D4 dataTemp = new ArrayFloat.D4(NREC,lvlDim.getLength(),latDim.getLength(), lonDim.getLength());
ArrayFloat.D4 dataPres = new ArrayFloat.D4(NREC,lvlDim.getLength(),latDim.getLength(), lonDim.getLength());
for(int record = 0; record < NREC; record++) {
i = 0;
for (int lvl = 0; lvl < NLVL; lvl++)
for (int lat = 0; lat < NLAT; lat++)
for (int lon = 0; lon < NLON; lon++)
{
dataPres.set(record, lvl, lat, lon, SAMPLE_PRESSURE + i);
dataTemp.set(record, lvl, lat, lon, SAMPLE_TEMP + i++);
}
}
//Create the file. At this point the (empty) file will be written to disk
dataFile.create();
// A newly created Java integer array to be initialized to zeros.
int[] origin = new int[4];
dataFile.write("latitude", lats);
dataFile.write("longitude", lons);
dataFile.write("pressure", origin, dataPres);
dataFile.write("temperature", origin, dataTemp);
} catch (IOException e) {
e.printStackTrace(System.err);
} catch (InvalidRangeException e) {
e.printStackTrace(System.err);
}finally {
if (dataFile != null)
try {
dataFile.close();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
System.out.println("*** SUCCESS writing example file "+filename);
}
}