"""
Features
--------

A demonstration of some of the built-in Natural Earth features found
in cartopy.

"""
__tags__ = ['Lines and polygons']

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


def main():
    fig = plt.figure()
    ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())
    ax.set_extent([-20, 60, -40, 45], crs=ccrs.PlateCarree())

    ax.add_feature(cfeature.LAND)
    ax.add_feature(cfeature.OCEAN)
    ax.add_feature(cfeature.COASTLINE)
    ax.add_feature(cfeature.BORDERS, linestyle=':')
    ax.add_feature(cfeature.LAKES, alpha=0.5)
    ax.add_feature(cfeature.RIVERS)

    plt.show()


if __name__ == '__main__':
    main()