When using the CMAPF routines with gempak, it is useful to know how to
specify gempak grids in terms of CMAPF parameters.

From the gempak documentation, at
http://www.unidata.ucar.edu/packages/gempak/tutorial/manual/
PROJ

     PROJ is the map projection, projection angles, and margins separated 
     by slashes and an optional image drop flag separated from the rest by
     a bar:

	map proj / ang1;ang2;ang3 / l;b;r;t (margins) | image drop flag

     For all map projections, the lower left and upper right corners of
     the graphics area should be specified in GAREA.

     The following simple map projections may be specified:

	MER	Mercator
	NPS	North Polar Stereographic
	SPS	South Polar Stereographic
	LCC	Northern Hemisphere Lambert Conic Conformal
	SCC	Southern Hemisphere Lambert Conic Conformal
	CED	Cylindrical Equidistant
	MCD	Modified Cylindrical Equidistant
	NOR	North Orthographic 
	SOR	South Orthographic 
	

     The following full map projections may also be specified:

	MER	(CYL)	Mercator
	CED	(CYL)	Cylindrical Equidistant
	MCD	(CYL)	Modified Cylindrical Equidistant
	STR	(AZM)	Polar Stereographic
	AED	(AZM)	Azimuthal Equidistant
	ORT	(AZM)	Orthographic
	LEA	(AZM)	Lambert equal area
	GNO	(AZM)	Gnomonic
	LCC	(CON)	Northern Hemisphere Lambert Conic Conformal
	SCC	(CON)	Southern Hemisphere Lambert Conic Conformal


     In addition for full map projections, three angles MUST be specified
     in PROJ.  The angles have the following meanings for the different
     projection classes:

	CYL	angle1 -- latitude of origin on the projection cylinder
			  0 = Equator
		angle2 -- longitude of origin on the projection cylinder
			  0 = Greenwich meridian
		angle3 -- angle to skew the projection by rotation of
			  the cylindrical surface of projection about
			  the line from the Earth's center passing
			  through the origin point. This results in
			  curved latitude and longitude lines.

			  If angle3 is greater than 360 or less than -360
			  degrees, then the rectangular Cartesian coordinate
			  system on the projection plane is rotated
			  +/- |angle3|-360 degrees. This results in
			  latitude and longitude lines that are skewed
			  with respect to the edge of the map.

			  The difference between |angle3| < 360 and
			  |angle3| > 360 is that, in the former case,
			  the rotation is applied to the developable
			  cylindrical surface before projection and
			  subsequent development; while, in the latter
			  case, the rotation is applied to the Cartesian
			  coordinate system in the plane after development.
			  Development here refers to the mathematical
			  flattening of the surface of projection into a
			  planar surface.

	    Exception:

   MCD	  angle1 -- scaling factor for latitude
			    			0 = default scaling (1/cos(avglat))
   	     angle2 -- longitude of origin (center longitude)
           angle3 -- not used


	AZM	  angle1 -- latitude of the projection's point of tangency
		     angle2 -- longitude of the projection's point of tangency
			  angle3 -- angle to skew the projection by rotation about
			            the line from the Earth's center passing
			            through the point of tangency

	CON	angle1 -- standard latitude 1
		angle2 -- polon is the central longitude
		angle3 -- standard latitude 2

     The angles for the full map projection types are given as three numbers 
     separated with semicolons.  Note that THREE angles must be entered even 
     if some angles are not used.

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For Polar Stereographic:
map NPS /90. ; pollon ; 0./