Package ucar.nc2.dt.grid

Class GridCoordinate2D

java.lang.Object

ucar.nc2.dt.grid.GridCoordinate2D

public class GridCoordinate2D
extends Object

2D Coordinate System has lat(x,y) and lon(x,y). This class implements finding the index (i,j) from (lat, lon) coord. This is for "one-off" computation, not a systematic lookup table for all points in a pixel array. Hueristic search of the 2D space for the cell that contains the point.

Since:

Jul 10, 2009

Method Summary

Modifier and Type	Method	Description
boolean	findCoordElement(double wantLat, double wantLon, int[] rectIndex)
boolean	findCoordElementForce(double wantLat, double wantLon, int[] rectIndex)
boolean	findCoordElementNoForce(double wantLat, double wantLon, int[] rectIndex)	Find the best index for the given lat,lon point.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

findCoordElementForce

public boolean findCoordElementForce(double wantLat,
                                     double wantLon,
                                     int[] rectIndex)

findCoordElement

public boolean findCoordElement(double wantLat,
                                double wantLon,
                                int[] rectIndex)

findCoordElementNoForce

public boolean findCoordElementNoForce(double wantLat,
                                       double wantLon,
                                       int[] rectIndex)

Find the best index for the given lat,lon point.

Parameters:

wantLat - lat of point

wantLon - lon of point

rectIndex - return (row,col) index, or best guess here. may not be null

Returns:

false if not in the grid.