Snapshot of `prepare_plot` method from https://gist.github.com/schaunwheeler/9a98d8bee5f039e9872c76fb24a6e69c

method_prepare_plot.py

"""
Code described in Medium post https://medium.com/@schaun.wheeler/codify-your-workflow-377f5f8bf4c3
Copyright (c) 2018 Valassis Digital under the terms of the BSD 3-Clause license.
"""

def prepare_plot(self, plot_width=700, plot_height=None, zoom=None, map_type='hybrid', **kwargs):
         
    zoom_level, lat_center, lng_center, auto_plot_height = self._estimate_zoom_level(plot_width)
    if plot_height is None:
        plot_height = auto_plot_height
             
    if zoom is None:
        zoom = zoom_level
    map_options = GMapOptions(lat=lat_center, lng=lng_center, map_type=map_type, zoom=zoom)
    self.plot = GMapPlot(
        x_range=Range1d(),
        y_range=Range1d(),
        map_options=map_options,
        plot_width=plot_width,
        plot_height=plot_height,
        **kwargs
    )
    self.plot.api_key = self.api_key
    self.plot.add_tools(WheelZoomTool(), ResetTool(), PanTool())