散景世界地图和着色水体

Question

Bokeh 中是否有与底图 drawmapboundary 等效的方法，您可以在其中指定特定颜色？看第一个例子here:

from mpl_toolkits.basemap import Basemap
import matplotlib.pyplot as plt
# setup Lambert Conformal basemap.
m = Basemap(width=12000000,height=9000000,projection='lcc',
            resolution='c',lat_1=45.,lat_2=55,lat_0=50,lon_0=-107.)
# draw coastlines.
m.drawcoastlines()
# draw a boundary around the map, fill the background.
# this background will end up being the ocean color, since
# the continents will be drawn on top.
m.drawmapboundary(fill_color='aqua')
# fill continents, set lake color same as ocean color.
m.fillcontinents(color='coral',lake_color='aqua')
plt.show()

我想用颜色 "aqua" 填充水体（例如海洋）。我可以生成黑白世界地图，但如何专门为海洋着色？

我正在为来自 here 的国家/地区使用 JSON 文件，然后使用 GeoJSONDataSource.

加载它

import bokeh.plotting as bkp
import bokeh.models as bkm

filename = "test.html"
tools = "pan,wheel_zoom,box_zoom,reset,previewsave"

with open("./countries.geo.json", "r") as f:
    countries = bkm.GeoJSONDataSource(geojson=f.read())

p = bkp.figure(width=1000, height=600, tools=tools, title='World Countries', x_axis_label='Longitude', y_axis_label='Latitude')
p.x_range = bkm.Range1d(start=-180, end=180)
p.y_range = bkm.Range1d(start=-90, end=90)
p.patches("xs", "ys", color="white", line_color="black", source=countries)

bkp.output_file(filename)
bkp.save(p, filename)

Answer 1

通过查看 drawmapboundary 的作用来弄清楚。只需要设置背景颜色。 :)

import bokeh.plotting as bkp
import bokeh.models as bkm

filename = "test.html"
tools = "pan,wheel_zoom,box_zoom,reset,previewsave"

with open("./countries.geo.json", "r") as f:
    countries = bkm.GeoJSONDataSource(geojson=f.read())

p = bkp.figure(width=1000, height=600, tools=tools, title='World Countries', x_axis_label='Longitude', y_axis_label='Latitude')
p.background_fill_color = "aqua"
p.x_range = bkm.Range1d(start=-180, end=180)
p.y_range = bkm.Range1d(start=-90, end=90)
p.patches("xs", "ys", color="white", line_color="black", source=countries)

bkp.output_file(filename)
bkp.save(p, filename)

散景世界地图和着色水体

Bokeh World Map and Coloring Waterbodies

python-3.x

matplotlib-basemap

bokeh