cnmaps 大版本更新：支持全球地图边界，内置 AI Skill

import cartopy.crs as ccrs
import matplotlib.pyplot as plt

from cnmaps import draw_maps, get_adm_maps

fig = plt.figure(figsize=(12, 6))
proj = ccrs.PlateCarree(central_longitude=105)
ax = fig.add_subplot(111, projection=proj)
ax.set_global()

china = get_adm_maps(country="中国", level="国", only_polygon=True, record="first")
world = get_adm_maps(level="国", only_polygon=True)

draw_maps(world, ax=ax, linewidth=0.22, color="dimgray")
draw_maps([china], ax=ax, linewidth=0.75, color="crimson")

plt.savefig("world-countries-borders-flat.png", bbox_inches="tight")
plt.show()

import cartopy.crs as ccrs
import matplotlib.pyplot as plt
from cnmaps import get_adm_maps, clip_streamplot_by_map, draw_map
from cnmaps.sample import load_wind

lons, lats, u, v = load_wind()

fig = plt.figure(figsize=(10, 10))
ax = fig.add_subplot(111, projection=ccrs.PlateCarree())
map_polygon = get_adm_maps(country='中国', record='first', only_polygon=True)

stream = ax.streamplot(
    lons[0, :],
    lats[:, 0],
    u,
    v,
    transform=ccrs.PlateCarree(),
    density=2.0,
    color='#1f77b4',
)

clip_streamplot_by_map(stream, map_polygon)
draw_map(map_polygon, color='k', linewidth=1)

plt.show()

import cartopy.crs as ccrs
import matplotlib.pyplot as plt
from matplotlib.colors import LightSource
from cnmaps import get_adm_maps, clip_imshow_by_map, draw_map
from cnmaps.sample import load_dem

lons, lats, dem = load_dem()
hillshade = LightSource(azdeg=315, altdeg=45).shade(
    dem,
    cmap=plt.cm.Greys,
    vert_exag=0.8,
    blend_mode='overlay',
)

fig = plt.figure(figsize=(10, 10))
ax = fig.add_subplot(111, projection=ccrs.PlateCarree())
map_polygon = get_adm_maps(country='中国', record='first', only_polygon=True)

image = ax.imshow(
    hillshade,
    extent=[lons.min(), lons.max(), lats.min(), lats.max()],
    origin='lower',
    transform=ccrs.PlateCarree(),
)

clip_imshow_by_map(image, map_polygon)
draw_map(map_polygon, color='k', linewidth=1)
ax.set_extent(map_polygon.get_extent())

plt.show()

from cnmaps import get_adm_maps

jingjin = get_adm_maps(province=['北京市', '天津市'], level='省')
henan_cities = get_adm_maps(province='河南省', city=['郑州市', '洛阳市'], level='市')
east_asia = get_adm_maps(country=['中国', 'JPN', 'KOR'], level='国')

from cnmaps import get_adm_maps

china = get_adm_maps(country='中国', level='国', record='first')
print(china.longitude, china.latitude)

henan = get_adm_maps(province='河南省', record='first')
print(henan.longitude, henan.latitude)

nanyang = get_adm_maps(city='南阳市', record='first')
print(nanyang.longitude, nanyang.latitude)

haidian = get_adm_maps(district='海淀区', record='first')
print(haidian.longitude, haidian.latitude)