edu.wisc.ssec.mcidas
Class MERCnav

java.lang.Object
  edu.wisc.ssec.mcidas.AREAnav
      edu.wisc.ssec.mcidas.MERCnav

All Implemented Interfaces:

Serializable

public final class MERCnav

extends AREAnav

Navigation class for Mercator (MERC) type nav. This code was modified from the original FORTRAN code (nvxmerc.dlm) on the McIDAS system. It only supports latitude/longitude to line/element transformations (LL) and vice/versa. Transform to 'XYZ' not implemented.

See Also:

McIDAS Programmer's Manual, Serialized Form

Field Summary

(package private) int	iwest
(package private) int	leftlon
(package private) double	xblat
(package private) double	xblon
(package private) double	xcol
(package private) double	xlat1
(package private) double	xqlon
(package private) double	xrow
(package private) double	xspace

Fields inherited from class edu.wisc.ssec.mcidas.AREAnav

DEGREES_TO_RADIANS, DMSP, GMSX, GOES, GVAR, indexEle, indexLat, indexLine, indexLon, LALO, LAMB, LL, MERC, MOLL, MSAT, MSG, MSGT, POES, PS, RADIANS_TO_DEGREES, RADR, RECT, serialVersionUID, TANC, XY

Constructor Summary

MERCnav(int[] iparms)
Set up for the real math work.

Method Summary

double[][]	toLatLon(double[][] linele) converts from satellite coordinates to latitude/longitude
float[][]	toLatLon(float[][] linele) converts from satellite coordinates to latitude/longitude
double[][]	toLinEle(double[][] latlon) toLinEle converts lat/long to satellite line/element
float[][]	toLinEle(float[][] latlon) toLinEle converts lat/long to satellite line/element

Methods inherited from class edu.wisc.ssec.mcidas.AREAnav

areaCoordToImageCoord, areaCoordToImageCoord, areaCoordToImageCoord, areaCoordToImageCoord, doubleToFloat, equals, floatToDouble, getLineOffset, imageCoordToAreaCoord, imageCoordToAreaCoord, imageCoordToAreaCoord, imageCoordToAreaCoord, isFlippedLineCoordinates, makeAreaNav, makeAreaNav, setFlipLineCoordinates, setImageStart, setMag, setMag, setRes, setRes, setStart, toString

Methods inherited from class java.lang.Object

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

Field Detail

iwest

int iwest

leftlon

int leftlon

xrow

double xrow

xcol

double xcol

xlat1

double xlat1

xspace

double xspace

xqlon

double xqlon

xblat

double xblat

xblon

double xblon

Constructor Detail

MERCnav

public MERCnav(int[] iparms)
        throws IllegalArgumentException

Set up for the real math work. Must pass in the int array of the MERC nav 'codicil'.

Parameters:

iparms - the nav block from the image file

Throws:

IllegalArgumentException - if the nav block is not a MERC type.

Method Detail

toLatLon

public double[][] toLatLon(double[][] linele)

converts from satellite coordinates to latitude/longitude

Specified by:

toLatLon in class AREAnav

Returns:

latlon[][] array of lat/long pairs. Output array is latlon[indexLat][] of latitudes and latlon[indexLon][] of longitudes.

toLinEle

public double[][] toLinEle(double[][] latlon)

toLinEle converts lat/long to satellite line/element

Specified by:

toLinEle in class AREAnav

Returns:

linele[][] array of line/element pairs. Where is an element. These are in 'file' coordinates (not "image" coordinates);

toLatLon

public float[][] toLatLon(float[][] linele)

converts from satellite coordinates to latitude/longitude

Overrides:

toLatLon in class AREAnav

Returns:

latlon[][] array of lat/long pairs. Output array is latlon[indexLat][] of latitudes and latlon[indexLon][] of longitudes.

toLinEle

public float[][] toLinEle(float[][] latlon)

toLinEle converts lat/long to satellite line/element

Overrides:

toLinEle in class AREAnav

Returns:

linele[][] array of line/element pairs. Where is an element. These are in 'file' coordinates (not "image" coordinates);