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# Metview Macro
# **************************** LICENSE START ***********************************
#
# Copyright 2015 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 ************************************
# ---------------------------------------------------------------
# Tags: mvl,coast
# Title: Geoline on Map
# Description: Demonstrates how to plot a line on any map
# projection using the Macro Library function
# mvl_geoline.
# ---------------------------------------------------------------
# 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
)
# create a geoline broken into 1-degree segments
line_increment_in_degrees = 1
# coordinates of line end-points given as lat1,lon1,lat2,lon2
geoline = mvl_geoline(55, -22, 5, 45, line_increment_in_degrees)
# define the plotting attributes for the line
line_visdef = mgraph
(
graph_line_colour : "red",
graph_line_thickness : "4",
graph_line_style : 'dash'
)
# Define the output media
to_psfile = ps_output
(
output_name : "plot" # extension is added automatically
)
# Check the runmode and decide which media to putput the plot to
mode = runmode()
if mode = "execute" or mode = "batch" then
setoutput(to_psfile)
end if
# plot the line on the map
plot(view, geoline, line_visdef)