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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: contour,legend # Title: Contour Shading and Positional Legend # Description: Demonstrates how to show a field using contour shading and # define a positional vertical legend. # See also: # https://software.ecmwf.int/magics/Contour+examples+contour5 # ------------------------------------------------------------------ # 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 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") then setoutput(to_psfile) else if (mode = "batch") then setoutput(to_psfile) else if (mode = "visualise") then print('screen') else fail("Only execute, batch and visualise allowed") end if # plot the data onto the map plot(my_view,my_data,my_contour,my_legend,my_coast,my_title)