ucar.nc2.dt.trajectory.Float10TrajectoryObsDataset Maven / Gradle / Ivy
/*
* 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.
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* any fee or cost, to use, copy, modify, alter, enhance and distribute
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// $Id: Float10TrajectoryObsDataset.java 63 2006-07-12 21:50:51Z edavis $
package ucar.nc2.dt.trajectory;
import ucar.nc2.dataset.NetcdfDataset;
import ucar.nc2.*;
import ucar.nc2.constants.FeatureType;
import ucar.nc2.dt.*;
import ucar.nc2.units.DateUnit;
import ucar.nc2.units.SimpleUnit;
import java.util.*;
import java.io.IOException;
/*
netcdf U:/testdata2/trajectory/buoy/testfloat10.nc {
dimensions:
DRIFTER100_110 = 11; // (has coord.var)
TIME1 = UNLIMITED; // (1199 currently) // (has coord.var)
variables:
double DRIFTER100_110(DRIFTER100_110);
:point_spacing = "even";
:AXIS = "X";
double TIME1(TIME1);
:units = "hour since 2001-07-10 12:00:00";
:time_origin = "10-JUL-2001 12:00:00";
float LONGITUDE(TIME1, DRIFTER100_110);
:missing_value = -1.0E34; // float
:_FillValue = -1.0E34; // float
:long_name = "float longitude";
:history = "From cgoa3_floats";
float LATITUDE(TIME1, DRIFTER100_110);
:missing_value = -1.0E34; // float
:_FillValue = -1.0E34; // float
:long_name = "float latitude";
:history = "From cgoa3_floats";
float DEPTH(TIME1, DRIFTER100_110);
:missing_value = 1.0E35; // float
:_FillValue = 1.0E35; // float
:long_name = "depth of floats trajectories";
:history = "From cgoa3_floats";
:units = "meter";
float TEMP(TIME1, DRIFTER100_110);
:missing_value = 1.0E35; // float
:_FillValue = 1.0E35; // float
:long_name = "potential temperature";
:history = "From cgoa3_floats";
:units = "Celsius";
float SALT(TIME1, DRIFTER100_110);
:missing_value = 1.0E35; // float
:_FillValue = 1.0E35; // float
:long_name = "salinity";
:history = "From cgoa3_floats";
:units = "PSU";
:history = "FERRET V5.51 3-Jan-05";
}
*/
/**
* Implements TrajectoryDataset for datasets with these characteristics:
*
* - it has two dimensions, an UNLIMITED time dimension and a trajectory dimension
* - it has two coordinate variables: 1) a time variable has units that
* are udunits time units; and 2) a trajectory variable
* - all other variables are on the (time, trajectory) coordinate system
* - has latitude, longitude, and depth variables, only DEPTH has units
* (compatible with "m").
*
*
* @deprecated use ucar.nc2.ft.point
* @author edavis
* @since Feb 22, 2005T5:37:14 PM
*/
public class Float10TrajectoryObsDataset extends MultiTrajectoryObsDataset implements TypedDatasetFactoryIF
{
private static String trajDimNameDefault = "DRIFTER100_110";
private static String trajVarNameDefault = "DRIFTER100_110";
private static String timeDimNameDefault = "TIME1";
private static String timeVarNameDefault = "TIME1";
private static String latVarNameDefault = "LATITUDE";
private static String lonVarNameDefault = "LONGITUDE";
private static String elevVarNameDefault = "DEPTH";
private String trajDimName;
private String trajVarName;
private String timeDimName;
private String timeVarName;
private String latVarName;
private String lonVarName;
private String elevVarName;
static public boolean isValidFile(NetcdfDataset ds)
{
// Check that has a time dimension and a trajectory dimension.
List list = ds.getRootGroup().getDimensions();
if ( list.size() != 2) return( false);
Dimension d;
for ( int i = 0; i < 2; i++)
{
d = (Dimension) list.get(i);
if ( ! d.getShortName().equals( timeDimNameDefault) &&
! d.getShortName().equals( trajDimNameDefault)) return( false);
}
// Check that has a trajectory coordinate variable.
Variable var = ds.getRootGroup().findVariable( trajVarNameDefault);
if ( var == null) return( false);
list = var.getDimensions();
if ( list.size() != 1) return( false);
d = (Dimension) list.get(0);
if ( ! d.getShortName().equals( trajDimNameDefault)) return( false);
// Check that has a time coordinate variable with units that are udunits time
var = ds.getRootGroup().findVariable( timeVarNameDefault);
if ( var == null) return( false);
list = var.getDimensions();
if ( list.size() != 1) return( false);
d = (Dimension) list.get(0);
if ( ! d.getShortName().equals( timeDimNameDefault)) return( false);
String units = var.findAttribute( "units").getStringValue();
Date date = DateUnit.getStandardDate( "0 " + units);
if ( date == null) return( false);
// Check for variable latitude(time) with units of "deg".
var = ds.getRootGroup().findVariable( latVarNameDefault);
if ( var == null) return( false);
list = var.getDimensions();
if ( list.size() != 2) return( false);
for ( int i = 0; i < 2; i++)
{
d = (Dimension) list.get(i);
if ( ! d.getShortName().equals( timeDimNameDefault) &&
! d.getShortName().equals( trajDimNameDefault)) return( false);
}
// units = var.findAttribute( "units").getStringValue();
// if ( ! SimpleUnit.isCompatible( units, "degrees_north")) return( false);
// Check for variable longitude(time) with units of "deg".
var = ds.getRootGroup().findVariable( lonVarNameDefault);
if ( var == null) return( false);
list = var.getDimensions();
if ( list.size() != 2) return( false);
for ( int i = 0; i < 2; i++)
{
d = (Dimension) list.get(i);
if ( ! d.getShortName().equals( timeDimNameDefault) &&
! d.getShortName().equals( trajDimNameDefault)) return( false);
}
// units = var.findAttribute( "units").getStringValue();
// if ( ! SimpleUnit.isCompatible( units, "degrees_east")) return( false);
// Check for variable altitude(time) with units of "m".
var = ds.getRootGroup().findVariable( elevVarNameDefault);
if ( var == null) return( false);
list = var.getDimensions();
if ( list.size() != 2) return( false);
for ( int i = 0; i < 2; i++)
{
d = (Dimension) list.get(i);
if ( ! d.getShortName().equals( timeDimNameDefault) &&
! d.getShortName().equals( trajDimNameDefault)) return( false);
}
units = var.findAttribute( "units").getStringValue();
if ( ! SimpleUnit.isCompatible( units, "m")) return( false);
return( true);
}
/////////////////////////////////////////////////
// TypedDatasetFactoryIF
public boolean isMine(NetcdfDataset ds) { return isValidFile(ds); }
public TypedDataset open( NetcdfDataset ncd, ucar.nc2.util.CancelTask task, StringBuilder errlog) throws IOException {
return new Float10TrajectoryObsDataset( ncd);
}
public FeatureType getScientificDataType() { return FeatureType.TRAJECTORY; }
public Float10TrajectoryObsDataset() {}
public Float10TrajectoryObsDataset( NetcdfDataset ncd ) throws IOException
{
super( ncd);
// Get the names of the two coordinate variables and dimensions
// and grab the variables and dimensions themselves.
trajDimName = trajDimNameDefault;
trajVarName = trajVarNameDefault;
timeDimName = timeDimNameDefault;
timeVarName = timeVarNameDefault;
latVarName = latVarNameDefault;
lonVarName = lonVarNameDefault;
elevVarName = elevVarNameDefault;
Variable latVar = ncd.getRootGroup().findVariable( latVarName );
latVar.addAttribute( new Attribute( "units", "degrees_north" ) );
Variable lonVar = ncd.getRootGroup().findVariable( lonVarName );
lonVar.addAttribute( new Attribute( "units", "degrees_east" ) );
this.setTrajectoryInfo( ncfile.getRootGroup().findDimension( trajDimName ),
ncfile.getRootGroup().findVariable( trajVarName ),
ncfile.getRootGroup().findDimension( timeDimName ),
ncfile.getRootGroup().findVariable( timeVarName ),
ncfile.getRootGroup().findVariable( latVarName ),
ncfile.getRootGroup().findVariable( lonVarName ),
ncfile.getRootGroup().findVariable( elevVarName ) );
}
}
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