text: # 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 the field grid values and define a
  #              list of contour levels.
  # ------------------------------------------------------------------------
  
  import metview as mv
  
  # read the input grib file
  my_data = mv.read("./t850.grb")
  
  # set up the coastlines
  my_coast = mv.mcoast(
      map_coastline_land_shade_colour="CREAM",
      map_grid_colour="TAN",
      map_grid="ON",
      map_coastline_colour="TAN",
      map_coastline_land_shade="ON",
  )
  
  # set up the geographical view
  my_view = mv.geoview(
      map_area_definition="CORNERS",
      map_projection="CYLINDRICAL",
      area=[25.00, -20.00, 65.00, 50.00],
      coastlines=my_coast,
  )
  
  # set up the contour so that grid values are shown
  my_contour = mv.mcont(
      contour_grid_value_plot="ON",
      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],
      contour_grid_value_height=0.30,
      contour_grid_value_plot_type="BOTH",
      contour_grid_value_marker_height=0.20,
      contour_line_colour="GREY",
      contour_highlight="OFF",
      contour_line_thickness=2,
      contour_label="OFF",
      contour_grid_value_lon_frequency=10,
      contour_grid_value_lat_frequency=10,
      legend="OFF",
  )
  
  # set-up the title
  my_title = mv.mtext(
      text_font_size=0.70,
      text_lines=[
          "Display the grid values and user-defined list of contour levels:",
          "[-20, -10, -5, -2.5, -1, -0.5, 0, 0.5, 1, 2.5, 5, 10, 20]",
          "",
      ],
      text_justification="LEFT",
      text_colour="CHARCOAL",
  )
  
  
  # define the output plot file
  mv.setoutput(mv.pdf_output(output_name="contour3"))
  
  # plot the data onto the map
  mv.plot(my_view, my_data, my_contour, my_title)
  