code: def draw_lines(self, callback):
          '''draw a series of connected lines on the map, calling callback when done'''
          from MAVProxy.modules.mavproxy_map import mp_slipmap
          self.draw_callback = callback
          self.draw_line = []
          self.map.add_object(mp_slipmap.SlipDefaultPopup(None)f draw_lines(self, callback):
          '''draw a series of connected lines on the map, calling callback when done'''
          from MAVProxy.modules.mavproxy_map import mp_slipmap
          self.draw_callback = callback
          self.draw_line = []
          self.map.add_object(mp_slipmap.SlipDefaultPopup(None))
docs: draw a series of connected lines on the map, calling callback when done