ncl_wmdrrg man page
WMDRRG — plots weather map regions (indicating "snow", "rain", etc.), or solid regions indicating temperature zones.
Synopsis
CALL WMDRRG(N,X,Y,ITYPE,NC,XC,YC)
CBinding Synopsis
#include <ncarg/gks.h>
void c_wmdrrg(int n, float *x, float *y, char *itype, int nc, float *xc, float *yc)
Description
 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.
Usage
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).
Access
To use WMDRRG or c_wmdrrg, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.
See Also
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
Copyright
Copyright (C) 19872009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.