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Contour Shading and Positional Legend Example
# Metview Macro
# **************************** LICENSE START ***********************************
#
# Copyright 2018 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 ************************************
# ------------------------------------------------------------------
# Description: Demonstrates how to show a field using contour shading and
# define a positional vertical legend.
# ------------------------------------------------------------------
# read the input grib file
my_data = read("t850.grb")
# set up the geographical view
my_view = geoview(map_area_definition : "CORNERS",
map_projection : "CYLINDRICAL",
area : [20.00,-20.00,70.00,50.00])
# set up the coastlines
my_coast = mcoast(map_coastline_thickness : 3,
map_grid_thickness : 2,
map_grid_colour : "GREY",
map_coastline_colour : "RGB(0.4,0.4,0.4)",
map_grid : "ON")
# set up the contour so that colour shading is used
my_contour = mcont(contour_level_selection_type : "LEVEL_LIST",
contour_level_list : [-20,-10,-5,-2.5,-1,-0.5,0,0.5,1,2.5,5,10,20,30],
contour_shade : "ON",
contour_shade_method : "AREA_FILL",
contour_shade_colour_method : "CALCULATE",
contour_shade_colour_direction : "CLOCKWISE",
contour_shade_max_level_colour : "RED",
contour_shade_min_level_colour : "BLUE",
contour_line_colour : "GREY",
contour_line_thickness : 2,
contour_highlight : "OFF",
contour_label : "OFF",
legend : "ON")
# set up the position and properties of the legend
my_legend = mlegend(legend_title : "ON",
legend_box_mode : "POSITIONAL",
legend_box_x_position : 26.00,
legend_box_x_length : 2.00,
legend_box_y_position : 2.00,
legend_box_y_length : 10.00,
legend_display_type : "CONTINUOUS",
legend_border : "OFF",
legend_text_font_size : 0.50,
legend_text_colour : "NAVY",
legend_title_text : "850hpa Temperature",
legend_title_orientation : "VERTICAL")
# set up the title
my_title = mtext(text_font_size : 0.70,
text_lines : ["Contour shading and positional legend.",
"User-defined list of contour levels.",
""],
text_justification : "LEFT",
text_colour : "CHARCOAL")
# define the output plot file
setoutput(pdf_output(output_name : 'contour5'))
# plot the data onto the map
plot(my_view,my_data,my_contour,my_legend,my_coast,my_title)
Contour Shading and Positional Legend Example
# Metview Example
# **************************** LICENSE START ***********************************
#
# Copyright 2018 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 ************************************
# ------------------------------------------------------------------
# Description: Demonstrates how to show a field using contour shading and
# define a positional vertical legend.
# ------------------------------------------------------------------
import metview as mv
# read the input grib file
my_data = mv.read("t850.grb")
# set up the geographical view
my_view = mv.geoview(map_area_definition = "CORNERS",
map_projection = "CYLINDRICAL",
area = [20.00,-20.00,70.00,50.00])
# set up the coastlines
my_coast = mv.mcoast(map_coastline_thickness = 3,
map_grid_thickness = 2,
map_grid_colour = "GREY",
map_coastline_colour = "RGB(0.4,0.4,0.4)",
map_grid = "ON")
# set up the contour so that colour shading is used
my_contour = mv.mcont(contour_level_selection_type = "LEVEL_LIST",
contour_level_list = [-20,-10,-5,-2.5,-1,-0.5,0,0.5,1,2.5,5,10,20,30],
contour_shade = "ON",
contour_shade_method = "AREA_FILL",
contour_shade_colour_method = "CALCULATE",
contour_shade_colour_direction = "CLOCKWISE",
contour_shade_max_level_colour = "RED",
contour_shade_min_level_colour = "BLUE",
contour_line_colour = "GREY",
contour_line_thickness = 2,
contour_highlight = "OFF",
contour_label = "OFF",
legend = "ON")
# set up the position and properties of the legend
my_legend = mv.mlegend(legend_title = "ON",
legend_box_mode = "POSITIONAL",
legend_box_x_position = 26.00,
legend_box_x_length = 2.00,
legend_box_y_position = 2.00,
legend_box_y_length = 10.00,
legend_display_type = "CONTINUOUS",
legend_border = "OFF",
legend_text_font_size = 0.50,
legend_text_colour = "NAVY",
legend_title_text = "850hpa Temperature",
legend_title_orientation = "VERTICAL")
# set up the title
my_title = mv.mtext(text_font_size = 0.70,
text_lines = ["Contour shading and positional legend.",
"User-defined list of contour levels.",
""],
text_justification = "LEFT",
text_colour = "CHARCOAL")
# define the output plot file
mv.setoutput(mv.pdf_output(output_name = 'contour5'))
# plot the data onto the map
mv.plot(my_view,my_data,my_contour,my_legend,my_coast,my_title)