ELTE Meteorológiai Tanszék => Oktatás => Magics++ oktatóanyag => MagML tartalom



Geopotenciál és hőmérsékleti mező ábrázolása

Ebben a példában az 500hPa-os főizobárszint geopotenciál mezejét izovonalasan és a 850hPa-os főizobárszint hőmérsékleti mezejét árnyékolt módban ábrázoljuk.
A megoldáshoz felhasznált geopotenciál grib fájl letölthető innen, a hőmérséklet grib fájl pedig innen.

<magics version='3.0'>
 
  <drivers>
        <png output_name='z500_t850'/>
  </drivers>

  <page> 
        <map subpage_upper_right_longitude = '65.000000'
                subpage_upper_right_latitude = '51.280000'
                subpage_lower_left_latitude = '21.510000'
                subpage_map_vertical_longitude = '0.000000'
                subpage_lower_left_longitude = '-37.270000'
                subpage_map_projection = 'polar_stereographic'
                fitted_mode='crop'
            margin_top='0'
            margin_left='0'
            margin_bottom='0'
            margin_right='0'>

                <plot>
                        <grib grib_id = 't850' grib_input_file_name = '../t850.g
rb' />
                        <contour contour_level_selection_type = 'interval'
                                 contour_shade_colour_method = 'list'
                                 contour_shade_method = 'area_fill'
                                 contour_shade = 'on'
                                 contour_shade_max_level = '48.000000'
                                 contour_hilo = 'off'
                                 contour = 'off'
                                 contour_label = 'off'
                                 contour_shade_min_level = '-48.000000'
                                 contour_interval = '4.000000'
                                 contour_shade_colour_list = 'rgb(0,0,0.5)/
                                                                rgb(0,0,0.5)/
                                                                rgb(0,0,0.85)/
                                                                rgb(0,0,0.5)/
                                                                rgb(0,0,0.85)/
                                                                rgb(0.25,0,1)/
                                                                blue_purple/
                                                                greenish_blue/
                                                                blue_green/
                                                                bluish_green/
                                                                yellow_green/
                                                                greenish_yellow/
                                                                yellow/
                                                                orangish_yellow/
                                                                orange_yellow/
                                                                yellowish_orange/
                                                                orange/
                                                                reddish_orange/
                                                                red_orange/
                                                                orangish_red/
                                                                red/
                                                                magenta/
                                                                magenta/
                                                                magenta' />
                </plot>
       
                <plot>
                        <grib grib_id = 'z500' grib_input_file_name = '../z500.grb' />
                        <contour contour_level_selection_type = 'interval'
                                        contour_line_colour = 'black'
                                        contour_hilo_height = '0.250000'
                                        contour_hilo = 'on'
                                        contour_hilo_quality = 'high'
                                        contour_line_thickness = '1'
                                        contour_label = 'off'
                                        contour_highlight_colour = 'black'
                                        contour_highlight_thickness = '2'
                                        contour_interval = '5' />
                </plot>


                <coastlines map_grid_colour = 'tan'
                                map_grid = 'on'
                                map_coastline_colour = 'tan'/>
        </map>
  </page>
</magics>

---

A program első részében megnevezzük a végeredményül szolgáló png képfájlt. Meghatározzuk a kivágatot a hosszúsági és szélességi koordináták megadásával; valamint definiáljuk a vetületet.
Importáljuk a hőmérséklet gribfájlját: t850.grb
Az árnyékolás beállításai a contour címke szakaszában található.

Majd megnyitjuk a geopotenciálhoz használandó z500.grb fájlt.
Itt a geopotenciál mezőt izovonalasan ábrázoljuk. Ehhez a beállításokat a contour címkén belül végezzük el.
A coastlines címke alatt megadjuk a rácshálózat és a partvonalak színét.


Futtatás:
magmlx pelda_8.magml

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