石川県の色塗り

main.py

import fiona
import matplotlib.cm as cm
import pandas as pd
from matplotlib.colors import to_hex
from staticmap import Polygon, StaticMap

# src: https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N03-v3_1.html
c = fiona.open("N03-20220101_17_GML/N03-22_17_220101.shp", "r")

df = pd.DataFrame(c)
df = pd.concat([df.properties.apply(pd.Series), df.geometry.apply(pd.Series)], axis=1)

cities = {}
cmap = cm.tab20

# src: https://maps.gsi.go.jp/development/ichiran.html
smap = StaticMap(2400, 1800, url_template="https://cyberjapandata.gsi.go.jp/xyz/blank/{z}/{x}/{y}.png")
for _, r in df.iloc[1:].iterrows():
    city = r["N03_004"]
    if city not in cities:
        cities[city] = to_hex(cmap(len(cities), alpha=0.6), keep_alpha=True)
    color = cities[city]
    poly = Polygon(r["coordinates"][0], color, color)
    smap.add_polygon(poly)

smap.render()