Translating very old macros to Metview 4

Original code:

cont  = pcont( contour_lo_colour : "blue" )
coast = pcoast( map_coastline_colour : "background" )

win = plotwindow
(
     row                             : 1,
     column                         : 1,
     width                          : 1000,
     height                         : 888,
     pane_organization              : "independent",
     subpage_map_projection         : "polar_stereographic",
     subpage_map_hemisphere         : "north",
     subpage_map_vertical_longitude : vert_long,
     area                           : [la1,lo1,la2,lo2],
     background                     : coast
)

Translated code:

cont = mcont( contour_hilo      : "on",
              contour_lo_colour : "blue" )

coast = mcoast( map_coastline_colour : "black" )

polar_view = geoview
(
     map_projection         : "polar_stereographic",
     map_hemisphere         : "north",
     map_vertical_longitude : vert_long,
     map_area_definition    : "corners",
     area                   : [la1,lo1,la2,lo2],
     coastlines             : coast
)

page = plot_page( view : polar_view )

win = plot_superpage( pages : [ page ] )