# 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)

## C-Binding 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) 1987-2009

University Corporation for Atmospheric Research

The use of this Software is governed by a License Agreement.