var draw_parking = func(group, apt, lod) {
      var group = group.createChild("group", "apt-"~apt.id);
      foreach(var park; apt.parking())
      {
        var icon_park =
          group.createChild("text", "parking-" ~ park.name)
                    .setDrawMode( canvas.Text.ALIGNMENT
                                + canvas.Text.TEXT )
                    .setText(park.name)
                    .setFont("LiberationFonts/LiberationMono-Bold.ttf")
                    .setGeoPosition(park.lat, park.lon)
                    .setFontSize(15, 1.3);
      }
}