tissot going over the North Pole

Nadie ha tomado este issue todavía.

Sorry if this is a known bug, but I could not find it in this repository, I think I might have seen it in Matplotlib:

When using tissot to plot the theoretical field of view of a satellite looking down to Earth, a ValueError is encountered if the tissot polygon crosses the North Pole. It does not happen on the South Pole.

> ValueError: undefined inverse geodesic (may be an antipodal point)

Code snipplet below. I installed Basemap (v1.2.0) through pip.

```
import matplotlib.pyplot as plt
from mpl_toolkits.basemap import Basemap
import math

earth_radius = 6371000. # m
fig = plt.figure()
m = Basemap(projection='cyl', resolution='l',
llcrnrlat=-90, urcrnrlat=90,
llcrnrlon=-180, urcrnrlon=180)

# define the position of the satellite
position = [300000., 75., 0.] # altitude, latitude, longitude

# radius needed by the tissot method
radius = math.degrees(math.acos(earth_radius / (earth_radius + position[0])))
m.tissot(position[2], position[1], radius, 100, facecolor='tab:blue', alpha=0.3) # longitude, latitude
m.scatter(position[2], position[1], marker='*', c='tab:red')

plt.show()
```

Comienza ejecutando el fragmento de Python reportado con Basemap 1.2.0 y la llamada a tissot que cruza el Polo Norte. Traza la ruta de tissot y su cálculo geodésico para identificar por qué el caso del polo genera ValueError. Se considera completado cuando el ejemplo del Polo Norte se ejecuta sin errores y el comportamiento existente del Polo Sur permanece intacto.

Escrito por el modelo de indexación a partir del texto del issue.