old_contents: from __future__ import print_function
  
  from bokeh.util.browser import view
  from bokeh.document import Document
  from bokeh.embed import file_html
  from bokeh.models.glyphs import Circle
  from bokeh.models import (
      GMapPlot, Range1d, ColumnDataSource,
      PanTool, WheelZoomTool, BoxSelectTool,
      BoxSelectionOverlay, GMapOptions)
  from bokeh.resources import INLINE
  
  x_range = Range1d()
  y_range = Range1d()
  
  # JSON style string taken from: https://snazzymaps.com/style/1/pale-dawn
  map_options = GMapOptions(lat=30.2861, lng=-97.7394, map_type="roadmap", zoom=13, styles="""
  [{"featureType":"administrative","elementType":"all","stylers":[{"visibility":"on"},{"lightness":33}]},{"featureType":"landscape","elementType":"all","stylers":[{"color":"#f2e5d4"}]},{"featureType":"poi.park","elementType":"geometry","stylers":[{"color":"#c5dac6"}]},{"featureType":"poi.park","elementType":"labels","stylers":[{"visibility":"on"},{"lightness":20}]},{"featureType":"road","elementType":"all","stylers":[{"lightness":20}]},{"featureType":"road.highway","elementType":"geometry","stylers":[{"color":"#c5c6c6"}]},{"featureType":"road.arterial","elementType":"geometry","stylers":[{"color":"#e4d7c6"}]},{"featureType":"road.local","elementType":"geometry","stylers":[{"color":"#fbfaf7"}]},{"featureType":"water","elementType":"all","stylers":[{"visibility":"on"},{"color":"#acbcc9"}]}]
  """)
  
  plot = GMapPlot(
      x_range=x_range, y_range=y_range,
      map_options=map_options,
      title="Austin"
  )
  
  source = ColumnDataSource(
      data=dict(
          lat=[30.2861, 30.2855, 30.2869],
          lon=[-97.7394, -97.7390, -97.7405],
          fill=['orange', 'blue', 'green']
      )
  )
  
  circle = Circle(x="lon", y="lat", size=15, fill_color="fill", line_color="black")
  plot.add_glyph(source, circle)
  
  pan = PanTool()
  wheel_zoom = WheelZoomTool()
  box_select = BoxSelectTool()
  
  plot.add_tools(pan, wheel_zoom, box_select)
  overlay = BoxSelectionOverlay(tool=box_select)
  plot.add_layout(overlay)
  
  doc = Document()
  doc.add_root(plot)
  
  if __name__ == "__main__":
      filename = "maps.html"
      with open(filename, "w") as f:
          f.write(file_html(doc, INLINE, "Google Maps Example"))
      print("Wrote %s" % filename)
      view(filename)
  
new_contents: from __future__ import print_function
  
  from bokeh.util.browser import view
  from bokeh.document import Document
  from bokeh.embed import file_html
  from bokeh.models.glyphs import Circle
  from bokeh.models import (
      GMapPlot, Range1d, ColumnDataSource,
      PanTool, WheelZoomTool, BoxSelectTool,
      BoxSelection, GMapOptions)
  from bokeh.resources import INLINE
  
  x_range = Range1d()
  y_range = Range1d()
  
  # JSON style string taken from: https://snazzymaps.com/style/1/pale-dawn
  map_options = GMapOptions(lat=30.2861, lng=-97.7394, map_type="roadmap", zoom=13, styles="""
  [{"featureType":"administrative","elementType":"all","stylers":[{"visibility":"on"},{"lightness":33}]},{"featureType":"landscape","elementType":"all","stylers":[{"color":"#f2e5d4"}]},{"featureType":"poi.park","elementType":"geometry","stylers":[{"color":"#c5dac6"}]},{"featureType":"poi.park","elementType":"labels","stylers":[{"visibility":"on"},{"lightness":20}]},{"featureType":"road","elementType":"all","stylers":[{"lightness":20}]},{"featureType":"road.highway","elementType":"geometry","stylers":[{"color":"#c5c6c6"}]},{"featureType":"road.arterial","elementType":"geometry","stylers":[{"color":"#e4d7c6"}]},{"featureType":"road.local","elementType":"geometry","stylers":[{"color":"#fbfaf7"}]},{"featureType":"water","elementType":"all","stylers":[{"visibility":"on"},{"color":"#acbcc9"}]}]
  """)
  
  plot = GMapPlot(
      x_range=x_range, y_range=y_range,
      map_options=map_options,
      title="Austin"
  )
  
  source = ColumnDataSource(
      data=dict(
          lat=[30.2861, 30.2855, 30.2869],
          lon=[-97.7394, -97.7390, -97.7405],
          fill=['orange', 'blue', 'green']
      )
  )
  
  circle = Circle(x="lon", y="lat", size=15, fill_color="fill", line_color="black")
  plot.add_glyph(source, circle)
  
  pan = PanTool()
  wheel_zoom = WheelZoomTool()
  
  plot.add_tools(pan, wheel_zoom)
  
  doc = Document()
  doc.add_root(plot)
  
  if __name__ == "__main__":
      filename = "maps.html"
      with open(filename, "w") as f:
          f.write(file_html(doc, INLINE, "Google Maps Example"))
      print("Wrote %s" % filename)
      view(filename)
  
subject: remove superfluous box_select tool