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"""
Tissot's Indicatrix
-------------------
Visualize Tissot's indicatrix on a map.
"""
__tags__ = ['Lines and polygons']
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
def main():
fig = plt.figure(figsize=(10, 5))
ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())
# make the map global rather than have it zoom in to
# the extents of any plotted data
ax.set_global()
ax.stock_img()
ax.coastlines()
ax.tissot(facecolor='orange', alpha=0.4)
plt.show()
if __name__ == '__main__':
main()
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