如何从 csv 文件中命名 matplotlib/geopandas map 中的每个城市？

Question

I have a csv file containing the cities in senegal, theres a city column, i have already used the long and lat columns to plot the points, but now id like to have each point have its city name next to it, and maybe later more information. how can i do this with matplotlib? thank you.

import geopandas as gpd
import matplotlib.pyplot as plt
import os
import pandas as pd

file = os.path.join("senegal_administrative","senegal_administrative.shp")

cities_file = os.path.join("senegal_administrative","sn.csv")

cities = pd.read_csv(cities_file)
senegal = gpd.read_file(file)

## THE MAP IS PLOTED HERE
axis = senegal.plot(color="lightblue",edgecolor = "black",figsize = (20,20))

def_geo = gpd.GeoDataFrame(cities,geometry = gpd.points_from_xy(cities.lng,cities.lat))
print(def_geo)

## I PLOT THE POINTS HERE
def_geo.plot(ax = axis,color = "black")

plt.show()

heres a dropbox link if you need the files, i really appreciate it: https://www.dropbox.com/sh/dr54pbc9a5zc5ke/AADMxnYHe4maAnwKArCsh1m8a?dl=0

Answer 1

To annotate the map, you can use .annotate() function. Here is the relevant parts of the code:

axis = senegal.plot(color="lightblue",edgecolor = "black",figsize = (12,12))
for idx,dat in cities.iterrows():
    #print(dat.city, dat.lng, dat.lat)
    axis.scatter(dat.lng, dat.lat, s=10, color='red')
    axis.annotate(dat.city, (dat.lng, dat.lat))

Plot will be similar to this: