cdm/src/main/java/ucar/nc2/dt/grid/GridAsPointDataset.java
public Point readData(GridDatatype grid, CalendarDate date, EarthLocation location, boolean bounded)  throws java.io.IOException {

  
	  if(!bounded){
		  if( Double.isNaN(location.getAltitude()) ){
			  return readData(grid, date, location.getLatitude(), location.getLongitude());
		  }else{
			  return readData(grid, date, location.getAltitude(), location.getLatitude(), location.getLongitude());
		  }
	  }
	  
	  //Bounded --> Read closest data 
	  GridCoordSystem gcs = grid.getCoordinateSystem();
	  int tidx = findTimeIndexForCalendarDate(gcs, date);	  
	  int[] xy = gcs.findXYindexFromLatLonBounded(location.getLatitude(), location.getLongitude(), null);
	    	  
	  LatLonPoint latlon = gcs.getLatLon(xy[0], xy[1]);
	  Point p = new Point();
	  p.lat = latlon.getLatitude();
	  p.lon = latlon.getLongitude();
	    	  
	  int zidx=-1;
	  if( !Double.isNaN(location.getAltitude())){
		    CoordinateAxis1D zAxis = gcs.getVerticalAxis();
		    zidx = zAxis.findCoordElement( location.getAltitude());
		    p.z = zAxis.getCoordValue( zidx);
	  }
	  
	  Array data = grid.readDataSlice(tidx, zidx, xy[1], xy[0]);	  	  
	  p.dataValue = data.getDouble( data.getIndex());
	  
	  return p;
  }
public Point readData(GridDatatype grid, CalendarDate date, EarthLocation location, boolean bounded)  throws java.io.IOException {

  
	  if(!bounded){
		  if( Double.isNaN(location.getAltitude()) ){
			  return readData(grid, date, location.getLatitude(), location.getLongitude());
		  }else{
			  return readData(grid, date, location.getAltitude(), location.getLatitude(), location.getLongitude());
		  }
	  }
	  
	  //Bounded --> Read closest data 
	  GridCoordSystem gcs = grid.getCoordinateSystem();
	  int tidx = findTimeIndexForCalendarDate(gcs, date);	  
	  int[] xy = gcs.findXYindexFromLatLonBounded(location.getLatitude(), location.getLongitude(), null);
	    	  
	  LatLonPoint latlon = gcs.getLatLon(xy[0], xy[1]);
	  Point p = new Point();
	  p.lat = latlon.getLatitude();
	  p.lon = latlon.getLongitude();
	    	  
	  int zidx=-1;
	  if( !Double.isNaN(location.getAltitude())){
		    CoordinateAxis1D zAxis = gcs.getVerticalAxis();
		    zidx = zAxis.findCoordElement( location.getAltitude());
		    p.z = zAxis.getCoordValue( zidx);
	  }
	  
	  Array data = grid.readDataSlice(tidx, zidx, xy[1], xy[0]);	  	  
	  p.dataValue = data.getDouble( data.getIndex());
	  
	  return p;
  }
public Point readData ( GridDatatype grid , CalendarDate date , EarthLocation location , boolean bounded ) throws java . io . IOException { if ( ! bounded ) { if ( Double . isNaN ( location . getAltitude ( ) ) ) { return readData ( grid , date , location . getLatitude ( ) , location . getLongitude ( ) ) ; } else { return readData ( grid , date , location . getAltitude ( ) , location . getLatitude ( ) , location . getLongitude ( ) ) ; } } //Bounded --> Read closest data 
 GridCoordSystem gcs = grid . getCoordinateSystem ( ) ; int tidx = findTimeIndexForCalendarDate ( gcs , date ) ; int [ ] xy = gcs . findXYindexFromLatLonBounded ( location . getLatitude ( ) , location . getLongitude ( ) , null ) ; LatLonPoint latlon = gcs . getLatLon ( xy [ 0 ] , xy [ 1 ] ) ; Point p = new Point ( ) ; p . lat = latlon . getLatitude ( ) ; p . lon = latlon . getLongitude ( ) ; int zidx = - 1 ; if ( ! Double . isNaN ( location . getAltitude ( ) ) ) { CoordinateAxis1D zAxis = gcs . getVerticalAxis ( ) ; zidx = zAxis . findCoordElement ( location . getAltitude ( ) ) ; p . z = zAxis . getCoordValue ( zidx ) ; } Array data = grid . readDataSlice ( tidx , zidx , xy [ 1 ] , xy [ 0 ] ) ; p . dataValue = data . getDouble ( data . getIndex ( ) ) ; return p ; }
Reads data for the given point (earthlocation) and if bounded is true returns data for the closest point within the grid, for points outside of the grid

@param grid read data from here
@param date at this time
@param location EarthLocation, if altitude is NaN assume that is 2D point
@param bounded if bounded, location must be in grid cell; otherwise get nearest grid point to location
@return the location and data value
@throws java.io.IOException on bad stuff
Reads data for the given point ( earthlocation ) and if bounded is true returns data for the closest point within the grid for points outside of the grid