ncl_wmdrft man page
WMDRFT — plots weather map front lines.
CALL WMDRFT (N, X, Y)
void c_wmdrft(int n, float *x, float *y)
(Integer, Input) - The number of points supplied in the second and third arguments.
(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 weather front.
(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 weather front.
Set the values for the appropriate internal parameters before calling WMDRFT to produce the desired weather front. The internal parameters that control the appearance of weather fronts are: ALO, ARC, BEG, BET, CFC, CS1, CS2, COL, DWD, END, FRO, LIN, NBZ, NMS, PAI, REV, SL1, SL2, SLF, STY, SWI, T1C, T2C, WFC, and WTY. The possible fronts are: warm, warm aloft, cold, cold aloft, stationary, stationary aloft, occluded, convergence line, instability line, intertropical. As mentioned above, the points specified in the X and Y arrays serve as control points for a spline curve that is fitted between the first and last point. The spline passes through the given points. If the desired front line is reasonably smooth, then only a few input points need be specified.
To use WMDRFT or c_wmdrft, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.
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 (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.