/usr/lib/python2.7/dist-packages/cartopy/examples/rotated_pole.py is in python-cartopy 0.14.2+dfsg1-2build3.
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Rotated pole boxes
------------------
This example demonstrates the way a box is warped when it is defined
in a rotated pole coordinate system.
Try changing the ``box_top`` to ``44``, ``46`` and ``75`` to see the effect
that including the pole in the polygon has.
"""
__tags__ = ['Lines and polygons']
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
def main():
rotated_pole = ccrs.RotatedPole(pole_latitude=45, pole_longitude=180)
box_top = 45
x, y = [-44, -44, 45, 45, -44], [-45, box_top, box_top, -45, -45]
ax = plt.subplot(211, projection=rotated_pole)
ax.stock_img()
ax.coastlines()
ax.plot(x, y, marker='o', transform=rotated_pole)
ax.fill(x, y, color='coral', transform=rotated_pole, alpha=0.4)
ax.gridlines()
ax = plt.subplot(212, projection=ccrs.PlateCarree())
ax.stock_img()
ax.coastlines()
ax.plot(x, y, marker='o', transform=rotated_pole)
ax.fill(x, y, transform=rotated_pole, color='coral', alpha=0.4)
ax.gridlines()
plt.show()
if __name__ == '__main__':
main()
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