maps_cities#
A plot showing a map of the world, highlighting cities where the population
is over 5,000 people, made using the GMapPlot
class.
Details
- Sampledata:
- Bokeh APIs:
bokeh.models.Scatter
,bokeh.models.GMapPlot
,bokeh.models.PanTool
,bokeh.models.WheelZoomTool
- More info:
- Keywords:
scatter, map, label, pantool, gmapplot, document
from bokeh.document import Document
from bokeh.embed import file_html
from bokeh.models import (ColumnDataSource, GMapOptions, GMapPlot,
Label, PanTool, Scatter, WheelZoomTool)
from bokeh.sampledata.world_cities import data
from bokeh.util.browser import view
# Google Maps now requires an API key. You can find out how to get one here:
# https://developers.google.com/maps/documentation/javascript/get-api-key
API_KEY = "GOOGLE_API_KEY"
map_options = GMapOptions(lat=15, lng=0, zoom=2)
plot = GMapPlot(
width=1000, height=500,
map_options=map_options, api_key=API_KEY, output_backend="webgl",
)
if plot.api_key == "GOOGLE_API_KEY":
plot.add_layout(Label(x=500, y=320, x_units='screen', y_units='screen',
text='Replace GOOGLE_API_KEY with your own key',
text_color='red', text_align='center'))
plot.title.text = "Cities of the world with a population over 5,000 people."
scatter = Scatter(x="lng", y="lat", size=5, line_color=None, fill_color='firebrick', fill_alpha=0.2)
plot.add_glyph(ColumnDataSource(data), scatter)
plot.add_tools(PanTool(), WheelZoomTool())
doc = Document()
doc.add_root(plot)
if __name__ == "__main__":
doc.validate()
filename = "maps_cities.html"
with open(filename, "w") as f:
f.write(file_html(doc, title="Google Maps - World cities Example"))
print(f"Wrote {filename}")
view(filename)