Two Wind Fields and Legend Box Example

#Metview Macro

#  **************************** LICENSE START ***********************************
# 
#  Copyright 2020 ECMWF. This software is distributed under the terms
#  of the Apache License version 2.0. In applying this license, ECMWF does not
#  waive the privileges and immunities granted to it by virtue of its status as
#  an Intergovernmental Organization or submit itself to any jurisdiction.
# 
#  ***************************** LICENSE END ************************************
# 

# read grib data
f = read("sandy_pl.grib")

# filter wind on tow pressure levels
f1 =read(data:f, param: ["u","v"], levelist: 850)
f2 =read(data:f, param: ["u","v"], levelist: 250)

# define wind plotting on lower level
wp_1 = mwind(
    wind_thinning_factor : 1,
    legend: "on",
    wind_arrow_colour    : "cyan",
    wind_arrow_legend_text : "m/s 850 hPa"
    )
   
# define wind plotting on upper level 
wp_2 = mwind(
    wind_thinning_factor   : 1,
    legend                 : "on",
    wind_arrow_colour      : "RGB(0.9641,0.8222,0.4634)",
    wind_arrow_legend_text : "m/s 250 hPa"
    )

# define coastlines
coast = mcoast(
    map_coastline_colour            : "RGB(0.794,0.7824,0.7824)",
    map_coastline_thickness         : 2,
    map_coastline_land_shade        : "on",
    map_coastline_land_shade_colour : "RGB(0.2706,0.2706,0.2706)",
    map_coastline_sea_shade         : "on",
    map_coastline_sea_shade_colour  : "RGB(0.2118,0.2118,0.2118)",
    map_grid_colour                 : "RGB(0.8941,0.8941,0.8941)",
    map_grid_longitude_increment    : 10
    )

# define map view
view = geoview(
    map_area_definition : "corners",
    area                : [24.8,-84,40,-63],
    coastlines          : coast
    )

# define legend
legend = mlegend(
    legend_box_mode             : "positional",
    legend_text_font_size       : 0.4,
    legend_entry_plot_direction : "column",
    legend_box_x_position       : 25,
    legend_box_y_position       : 12,
    legend_box_x_length         : 4,
    legend_box_y_length         : 2.3,
    legend_box_blanking         : "on",
    legend_border               : "on",
    legend_border_colour        : "black",
    legend_entry_text_width     : 5
    ) 
    
# define title
title = mtext(text_font_size: 0.35)

# define the output plot file
setoutput(pdf_output(output_name : 'wind_overlay_and_legend_box')) 

# generate plot
plot(view, f1, wp_1, f2, wp_2, legend, title)

"""
Wind Field Overlay and Legend Box
"""

#  **************************** LICENSE START ***********************************
#
#  Copyright 2020 ECMWF. This software is distributed under the terms
#  of the Apache License version 2.0. In applying this license, ECMWF does not
#  waive the privileges and immunities granted to it by virtue of its status as
#  an Intergovernmental Organization or submit itself to any jurisdiction.
#
#  ***************************** LICENSE END ************************************
#

import metview as mv

# read grib data
f = mv.read("sandy_pl.grib")

# filter wind on tow pressure levels
f1 = mv.read(data=f, param=["u", "v"], levelist=850)
f2 = mv.read(data=f, param=["u", "v"], levelist=250)

# define wind plotting on lower level
wp_1 = mv.mwind(
    wind_thinning_factor=1,
    legend="on",
    wind_arrow_colour="cyan",
    wind_arrow_legend_text="m/s 850 hPa",
)

# define wind plotting on upper level
wp_2 = mv.mwind(
    wind_thinning_factor=1,
    legend="on",
    wind_arrow_colour="RGB(0.9641,0.8222,0.4634)",
    wind_arrow_legend_text="m/s 250 hPa",
)

# define coastlines
coast = mv.mcoast(
    map_coastline_colour="RGB(0.794,0.7824,0.7824)",
    map_coastline_thickness=2,
    map_coastline_land_shade="on",
    map_coastline_land_shade_colour="RGB(0.2706,0.2706,0.2706)",
    map_coastline_sea_shade="on",
    map_coastline_sea_shade_colour="RGB(0.2118,0.2118,0.2118)",
    map_grid_colour="RGB(0.8941,0.8941,0.8941)",
    map_grid_longitude_increment=10,
)

# define map view
view = mv.geoview(
    map_area_definition="corners", area=[24.8, -84, 40, -63], coastlines=coast
)

# define legend
legend = mv.mlegend(
    legend_box_mode="positional",
    legend_text_font_size=0.4,
    legend_entry_plot_direction="column",
    legend_box_x_position=25,
    legend_box_y_position=12,
    legend_box_x_length=4,
    legend_box_y_length=2.3,
    legend_box_blanking="on",
    legend_border="on",
    legend_border_colour="black",
    legend_entry_text_width=5,
)

# define title
title = mv.mtext(text_font_size=0.35)

# define the output plot file
mv.setoutput(mv.pdf_output(output_name="wind_overlay_and_legend_box"))

# generate plot
mv.plot(view, f1, wp_1, f2, wp_2, legend, title)