code: def delaunay(data, line_color=None, line_width=2, cmap=None, max_lenght=100):
      
      from geoplotlib.layers import DelaunayLayer
      _global_config.layers.append(DelaunayLayer(data, line_color, line_width, cmap, max_lenght))
docs: Draw a delaunay triangulation of the points
  
      :param data: data access object
      :param line_color: line color
      :param line_width: line width
      :param cmap: color map
      :param max_lenght: scaling constant for coloring the edges