ORIGIN

Basemap learning

2020-02-15

Python Knowledge points Basemap 1 mins186 words

Since I have already introduced Basemap and how to install , I’ll start it directly.

Basic map

First import libraries for drawing maps.

1 2	import matplotlib.pyplot as plot from mpl_toolkits.basemap import Basemap

And then create a basemap project.

map = Basemap(
    projection='ortho', # there a many other projections
    lat_0 = 0, # latitude
    lon_0 = 0 # longitude
)

(for more projections, visit https://matplotlib.org/basemap/users/mapsetup.html)

Draw the map.

# draw the outlines of the projection and fill it with color
map.drawmapboundary(fill_color="aqua")
# fill the continents with color
# color stands for continent color, lake_color is the lake color
map.fillcontinents(color="green",lake_color="aqua")
# draw the costlines
map.drawcoastlines()

Show the map.

1 2	plot.savefig('map.png') # save a picture plot.show() # start a console to draw the map

So the complete code would be this:

import matplotlib.pyplot as plot 
from mpl_toolkits.basemap import Basemap

map = Basemap(
    projection='ortho',
    lat_0 = 0, 
    lon_0 = 0
)

map.drawmapboundary(fill_color="aqua")
map.fillcontinents(color="green",lake_color="aqua") 
map.drawcoastlines()


plot.savefig('test.png')
plot.show()