极地立体投影与彩色海洋的Geopandas世界地图

时间:2019-04-12 12:16:16

标签: python geopandas cartopy

为此question添加一个进一步的要求,我还需要将海洋设置为蓝色(或其他任何颜色)。

对于“ PlateCarree”投影,我可以简单地做到这一点

crs = ccrs.PlateCarree()
crs_proj4 = crs.proj4_init
world = gpd.read_file(gpd.datasets.get_path("naturalearth_lowres"))
w = world.to_crs(crs_proj4)
g = w.plot(facecolor='sandybrown', edgecolor='black')

现在添加海洋的颜色

g.set_facecolor('#A8C5DD')

如果我现在想使用极地立体影像学

ccrs.NorthPolarStereo()

ccrs.SouthPolarStereo()

投影不起作用。将答案应用于此question时,我无法使海洋变色

1 个答案:

答案 0 :(得分:1)

您需要在Cartopy geoaxes上绘制地图几何图形,并使用cartopy.feature.OCEAN绘制海洋。这是您可以尝试的工作代码。阅读代码中的注释以进行澄清。

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

facecolor = 'sandybrown'
edgecolor = 'black'
ocean_color = '#A8C5DD'

#crs1 = ccrs.SouthPolarStereo()
crs1 = ccrs.NorthPolarStereo()

world = gpd.read_file(gpd.datasets.get_path("naturalearth_lowres"))
w1 = world.to_crs(crs1.proj4_init)

fig1, ax1 = plt.subplots(figsize=(7,7), subplot_kw={'projection': crs1})

# useful code to set map extent,
# --- if you want maximum extent, comment out the next line of code ---
ax1.set_extent([-60.14, 130.4, -13.12, -24.59], crs=ccrs.PlateCarree())

# at maximum extent, the circular bound trims map features nicely
ax1.add_geometries(w1['geometry'], crs=crs1, \
                facecolor=facecolor, \
                edgecolor=edgecolor, \
                linewidth=0.5)

# this adds the ocean coloring
ax1.add_feature(cartopy.feature.OCEAN, facecolor=ocean_color, edgecolor='none')

plt.show()

输出图将是:

enter image description here