City Populations 2050

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import pandas as pd
import geoviews as gv
import geoviews.tile_sources as gvts

gv.extension('bokeh')

Declare data

cities = pd.read_csv('../../assets/cities.csv', encoding="ISO-8859-1")

points = gv.Points(cities, ['Longitude', 'Latitude'], ['City', 'Population', 'Country', 'Year'],
                   label='Top 20 Cities by population in 2050').select(Year=2050).sort('Population').iloc[-20:]

Plot

(gvts.CartoMidnight *
 points.opts(
    size=gv.dim('Population')*0.000002, fill_color='Population', line_color='gray', cmap='viridis',
    width=700, height=600, global_extent=True, tools=['hover'], show_legend=False) *
 gv.Labels(points).opts(
    text_font_size='8pt', text_color='white'))

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Download this notebook from GitHub (right-click to download).