Let us see how to plot glyphs over a Google Map :
- Import the required libraries and modules :
- gmap from bokeh.plotting
- ColumnDataSource and GMapOptions from bokeh.models
- output_file and show from bokeh.io
- Create a file to store our model using
output_file()
. - Configure the Google map using
GMapOptions()
. - Generate a GoogleMap object using
gmap()
. - Determine the coordinates of the glyphs using
ColumnDataSource()
. - Generate the glyphs on the created Google map object.
- Display the Google map using
show()
.
# importing the required modules from bokeh.plotting import gmap from bokeh.models import ColumnDataSource, GMapOptions from bokeh.io import output_file, show # file to save the model output_file( "gfg.html" ) # configuring the Google map lat = 28.7041 lng = 77.1025 map_type = "hybrid" zoom = 11 google_map_options = GMapOptions(lat = lat, lng = lng, map_type = map_type, zoom = zoom) # generating the Google map google_api_key = "" title = "Delhi" google_map = gmap(google_api_key, google_map_options, title = title) # the coordinates of the glyphs source = ColumnDataSource( data = dict (lat = [ 28.6 , 28.65 , 28.7 , 28.75 , 28.8 , 28.85 ], lon = [ 76.95 , 77 , 77.05 , 77.1 , 77.15 , 77.25 ])) # generating the glyphs on the Google map x = "lon" y = "lat" size = 20 fill_color = "red" fill_alpha = 1 google_map.square(x = x, y = y, size = size, fill_color = fill_color, fill_alpha = fill_alpha, source = source) # displaying the model show(google_map) |
Output :
Python Bokeh – Plotting glyphs over a Google Map
Bokeh is a Python interactive data visualization. It renders its plots using HTML and JavaScript. It targets modern web browsers for presentation providing elegant, concise construction of novel graphics with high-performance interactivity.
Bokeh can be used to plot glyphs over a Google map. A glyph is a hieroglyphic character or a symbol. To use Google maps in Bokeh, we will use the gmap()
function of the plotting
class.