@BeginModule
@NewPage
@Name      = Magvector
@Title     = Lat/Lon vector plot
@Section   = Magics
@Arguments = ifile ofile
@Operators = vector

@BeginDescription
This operator generates 2D Lon/Lat vector plots.
The data for the plot is read from @file{ifile}. The input is expected to contain two velocity
components. The result is written to @file{ofile}. The default output file format is postscript,
this can be changed with the device parameter.

Here is a list of all vector plot parameters:

@BeginTable
 @bold{Keyname}     & @bold{Type}    & @bold{Description}      
 device      & STRING  & Output device (ps, eps, pdf, png, gif, gif_animation, jpeg, svg, kml)
 projection  & STRING  & Projection (cylindrical, polar_stereographic, robinson, mercator)
 thin_fac    & FLOAT   & Controls the actual number of wind arrows or flags plotted.
 unit_vec    & FLOAT   & Wind speed in m/s represented by a unit vector (1.0 cm)
 step_freq   & INTEGER & Frequency of time steps to be considered for making the animation
             &         & (device=gif_animation). Default value is "1" (all time steps).
             &         & Will be ignored if input file has multiple variables.
@EndTable
@EndDescription
@EndModule


@BeginOperator_vector
@Title     = Vector arrows plot
@Parameter = params
@EndOperator


@BeginParameter
@Item = params
STRING   Comma separated list of plot parameters
@EndParameter
