Geocircle on Map Example

#Metview Macro

# **************************** LICENSE START ***********************************
#
# Copyright 2019 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 ************************************
 
# ---------------------------------------------------------------
# Demonstrates how to plot a circle on any map projection using 
# mvl_geocircle().
# ---------------------------------------------------------------
 
# set up the shaded coastlines
land_sea_shade = mcoast(
    map_coastline_land_shade        : "on",
    map_coastline_land_shade_colour : "RGB(0.98,0.95,0.82)",
    map_coastline_sea_shade         : "on",
    map_coastline_sea_shade_colour  : "RGB(0.85,0.93,1)"
    )
 
# define the geographic view
view = geoview(
    map_projection      : "polar_stereographic",
    map_area_definition : "corners",
    area                : [-5,-30,10,84],  # S,W,N,E
    coastlines          : land_sea_shade
    )
 
# define the radius of the circles (in km)
circle_radius = 200
 
# the circle will be made up of this many segments
circle_resolution = 80
 
# define the centres of the circles
latPos = [58,48,38,28,18,8]
lonPos = [-20,-8,4,16,28,40]
 
# build the plot the finition of the circles
pltLst=nil
for i=1 to count(latPos) do
 
    # define the cirle around the specifed coordinates
    iv_circle = mvl_geocircle(latPos[i],lonPos[i],circle_radius,circle_resolution)
 
    # define the plotting attributes for the circle
    graph_circle = mgraph
    (
        graph_line_colour    : "red",
        graph_line_thickness : "4",
        graph_line_style     : 'solid'
    )
 
    # collect the plot definitions into a list
    pltLst=pltLst & [iv_circle,graph_circle]
 
end for
 
# define the output plot file
setoutput(pdf_output(output_name : 'geocircle_on_map'))
 
# plot the circles on the map
plot(view, pltLst)

import metview as mv

# **************************** LICENSE START ***********************************
#
# Copyright 2019 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 ************************************
 
# ---------------------------------------------------------------
# Demonstrates how to plot a circle on any map projection using 
# mvl_geocircle().
# ---------------------------------------------------------------
 
# set up the shaded coastlines
land_sea_shade = mv.mcoast(
    map_coastline_land_shade        = "on",
    map_coastline_land_shade_colour = "RGB(0.98,0.95,0.82)",
    map_coastline_sea_shade         = "on",
    map_coastline_sea_shade_colour  = "RGB(0.85,0.93,1)"
    )
 
# define the geographic view
view = mv.geoview(
    map_projection      = "polar_stereographic",
    map_area_definition = "corners",
    area                = [-5,-30,10,84],  # S,W,N,E
    coastlines          = land_sea_shade
    )
 
# define the radius of the circles (in km)
circle_radius = 200
 
# the circle will be made up of this many segments
circle_resolution = 80
 
# define the centres of the circles
latPos = [58,48,38,28,18,8]
lonPos = [-20,-8,4,16,28,40]
 
# build the plot the finition of the circles
plt_lst = []
for i in range(0,len(latPos)):
 
    # define the cirle around the specifed coordinates
    iv_circle = mv.mvl_geocircle(latPos[i], lonPos[i], circle_radius, circle_resolution)
 
    # define the plotting attributes for the circle
    graph_circle = mv.mgraph(
        graph_line_colour    = "red",
        graph_line_thickness = "4",
        graph_line_style     = 'solid'
    )
 
    # collect the plot definitions into a list
    plt_lst.append([iv_circle, graph_circle])
 
# define the output plot file
mv.setoutput(mv.pdf_output(output_name = 'geocircle_on_map'))
 
# plot the circles on the map
mv.plot(view, plt_lst)