WMDRRG - plots weather map regions (indicating "snow", "rain", etc.), or solid regions indicating

       To  use WMDRRG or c_wmdrrg, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in
       that order.

       #include <ncarg/gks.h>

       void c_wmdrrg(int n, float *x, float *y, char *itype, int nc, float *xc, float *yc)

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.

UNIX                                              January 1995                                    WMDRRG(3NCARG)

       N           (Integer, Input) - The number of points supplied in the second and third arguments.

       X           (Real, Input) - The X coordinates  (specified in world coordinates) of N points that  specify
                   the control points of a spline curve that will be fitted to represent the requested region.

       Y           (Real,  Input) - The Y coordinates  (specified in world coordinates) of N points that specify
                   the control points of a spline curve that will be fitted to represent the requested region.

       ITYPE       (Character, Input) - Indicates the weather type to fill the region with, or a solid color.

                   ITYPE can be one of:

                           'T' for thunderstorms

                           'SH' for showers

                           'R' for rain

                           'F' for flurries

                           'SN' for snow

                           'I' for ice

                           'INDEXnn' where the number "nn" denotes a color index for a solid fill.

       NC          (Integer, input) - If NC is greater than 2, then the region resulting from the spline fit  to
                   ((X(I),Y(I)),I=1,N)  will  be  clipped  against  the  region in ((XC(I),YC(I)),I=1,NC). If no
                   clipping is to be done, then set NC equal to 1.

       XC          (Real, Input) - The X coordinates  (specified in world coordinates) of NC points that specify
                   a clipping polygon for the region resulting from the spline fit to ((X(I),Y(I)),I=1,N), if NC
                   is greater than 2.

       YC          (Real, Input) - The Y coordinates  (specified in world coordinates) of NC points that specify
                   a clipping polygon for the region resulting from the spline fit to ((X(I),Y(I)),I=1,N), if NC
                   is greater than 2.

       WMDRRG  -  plots  weather  map  regions  (indicating  "snow",  "rain", etc.), or solid regions indicating
       temperature zones.

       Online: wmap, wmdflt, wmgetc, wmgeti, wmgetr, wmsetc, wmseti, wmsetr, wmap_params

       Hardcopy: WMAP - A Package for Producing Daily Weather Maps and Plotting Station Model Data

       CALL WMDRRG(N,X,Y,ITYPE,NC,XC,YC)

       Set the values for the appropriate internal parameters before  calling  WMDRRG  to  produce  the  desired
       region.  The  internal  parameters that control the appearance of regions are: COL and RHT.  As mentioned
       above, the points specified in the X and Y arrays serve as control points for  a  spline  curve  that  is
       fitted to the input polygon.  X(N) should equal X(1) and Y(N) should equal Y(1).