python - Is there a way to overlay a bar chart (matplotlib) onto a map (geopandas)?

Question

I plot the map like this. How can I overlay it with a barplot?

import geopandas as gpd
import matplotlib.pyplot as plt

world = gpd.read_file(gpd.datasets.get_path('naturalearth_lowres'))
ax = world.plot()
plt.show()

It should be similar to this image I found online:

question from:https://stackoverflow.com/questions/65854228/is-there-a-way-to-overlay-a-bar-chart-matplotlib-onto-a-map-geopandas

Answer 1

It's easy to overlay the two plots, what is hard is to put the bar chart exactly over a point coordinate. I made this example with only one bar chart, but it's only an approximation:

import geopandas as gpd
import matplotlib.pyplot as plt
world = gpd.read_file(gpd.datasets.get_path('naturalearth_lowres'))
fig = plt.figure()
ax_map = fig.add_axes([0, 0, 1, 1])
world.plot(ax=ax_map)
lat, lon = 19.432608, -99.133208
ax_bar = fig.add_axes([0.5*(1+lon/180) , 0.5*(1+lat/90) , 0.05, 0.05])
ax_bar.bar([1, 2, 3], [1, 2, 3], color=['C1', 'C2', 'C3'])
ax_bar.set_axis_off()
plt.show()