w3fb09.f File Reference

Merc (i,j) to lat/lon for grib. More...

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Functions/Subroutines
subroutine	w3fb09 (xi, xj, alat1, alon1, alatin, dx, alat, alon)
	Converts a location on Earth given in an i,j coordinate system overlaid on a mercator map projection to the coordinate system of latitude/longitude w3fb09() is the reverse of w3fb08() uses grib specification of the location of the grid.

Detailed Description

Merc (i,j) to lat/lon for grib.

Author

John Stackpole

Date

1988-03-01

Definition in file w3fb09.f.

Function/Subroutine Documentation

w3fb09()

subroutine w3fb09	(		xi,
			xj,
			alat1,
			alon1,
			alatin,
			dx,
			alat,
			alon
	)

Converts a location on Earth given in an i,j coordinate system overlaid on a mercator map projection to the coordinate system of latitude/longitude w3fb09() is the reverse of w3fb08() uses grib specification of the location of the grid.

Program history log:

• John Stackpole 1988-03-01
• Ralph Jones 1990-04-12 Convert to cray cft77 fortran.

Parameters

[in]	XI	I coordinate of the point.
[in]	XJ	J coordinate of the point; both real*4.
[in]	ALAT1	Latitude of lower left corner of grid (point (1,1)).
[in]	ALON1	Longitude of lower left corner of grid (point (1,1)) all real*4.
[in]	ALATIN	The latitude at which the mercator cylinder intersects the Earth.
[in]	DX	Mesh length of grid in meters at alatin.
[out]	ALAT	Latitude in degrees (negative in southern hemis).
[out]	ALON	East longitude in degrees, real*4 of the point specified by (i,j).

Note

Formulae and notation loosely based on hoke, hayes, and renninger's "map projections and grid systems...", march 1981 afgwc/tn-79/003

Author

John Stackpole

Date

1988-03-01

Definition at line 32 of file w3fb09.f.