/*
* 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
* supporting documentation. Further, UCAR requests that the user credit
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* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
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*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
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*/
package ucar.nc2.dt.grid;
import ucar.nc2.dt.GridDatatype;
import ucar.nc2.dt.GridCoordSystem;
import ucar.nc2.dataset.CoordinateAxis1DTime;
import ucar.nc2.dataset.CoordinateAxis1D;
import ucar.ma2.Array;
import ucar.unidata.geoloc.LatLonPoint;
import java.util.*;
/**
* Add Point operations to a GridDataset.
*
* @author caron
*/
public class GridAsPointDataset {
private List<GridDatatype> grids;
private List<Date> dates;
public GridAsPointDataset( List<GridDatatype> grids) {
this.grids = grids;
HashSet<Date> dateHash = new HashSet<Date>();
List<CoordinateAxis1DTime> timeAxes = new ArrayList<CoordinateAxis1DTime>();
for (GridDatatype grid : grids) {
GridCoordSystem gcs = grid.getCoordinateSystem();
CoordinateAxis1DTime timeAxis = gcs.getTimeAxis1D();
if ((timeAxis != null) && !timeAxes.contains(timeAxis)) {
timeAxes.add(timeAxis);
Date[] timeDates = timeAxis.getTimeDates();
for (Date timeDate : timeDates)
dateHash.add(timeDate);
}
}
dates = Arrays.asList( dateHash.toArray(new Date[dateHash.size()]));
Collections.sort(dates);
}
public List<Date> getDates() { return dates; }
public boolean hasTime( GridDatatype grid, Date date) {
GridCoordSystem gcs = grid.getCoordinateSystem();
CoordinateAxis1DTime timeAxis = gcs.getTimeAxis1D();
return (timeAxis != null) && timeAxis.hasTime( date);
}
public double getMissingValue(GridDatatype grid) {
return Double.NaN;
//VariableEnhanced ve = grid.getVariable();
//return ve.getValidMax(); // LOOK bogus
}
public Point readData(GridDatatype grid, Date date, double lat, double lon) throws java.io.IOException {
GridCoordSystem gcs = grid.getCoordinateSystem();
CoordinateAxis1DTime timeAxis = gcs.getTimeAxis1D();
int tidx = timeAxis.findTimeIndexFromDate( date);
int[] xy = gcs.findXYindexFromLatLonBounded(lat, lon, null);
Array data = grid.readDataSlice(tidx, -1, xy[1], xy[0]);
// use actual grid midpoint
LatLonPoint latlon = gcs.getLatLon(xy[0], xy[1]);
Point p = new Point();
p.lat = latlon.getLatitude();
p.lon = latlon.getLongitude();
p.dataValue = data.getDouble( data.getIndex());
return p;
}
public boolean hasVert( GridDatatype grid, double zCoord) {
GridCoordSystem gcs = grid.getCoordinateSystem();
CoordinateAxis1D zAxis = gcs.getVerticalAxis();
if (zAxis == null) return false;
return (zAxis.findCoordElement( zCoord) >= 0);
}
public Point readData(GridDatatype grid, Date date, double zCoord, double lat, double lon) throws java.io.IOException {
GridCoordSystem gcs = grid.getCoordinateSystem();
CoordinateAxis1DTime timeAxis = gcs.getTimeAxis1D();
int tidx = timeAxis.findTimeIndexFromDate( date);
CoordinateAxis1D zAxis = gcs.getVerticalAxis();
int zidx = zAxis.findCoordElement( zCoord);
int[] xy = gcs.findXYindexFromLatLon(lat, lon, null);
Array data = grid.readDataSlice(tidx, zidx, xy[1], xy[0]);
// use actual grid midpoint
LatLonPoint latlon = gcs.getLatLon(xy[0], xy[1]);
Point p = new Point();
p.lat = latlon.getLatitude();
p.lon = latlon.getLongitude();
p.z = zAxis.getCoordValue( zidx);
p.dataValue = data.getDouble( data.getIndex());
return p;
}
public class Point {
public double lat,lon,z,dataValue;
}
}