simple_world_map.py

### simple cylindrical world map... requires https://github.com/wyojustin/astropy_visibility/blob/main/world.npy
def plot_world_map():
    fig, ax = pl.subplots(1, figsize=(12, 6))
    ax.set_xticks(np.arange(-180, 181, 60))
    ax.set_yticks(np.arange(-90, 91, 30))
    antarctica = world[:,1] < -60
    ant = world[antarctica]
    start = np.argmin(ant[:,0])
    stop = np.argmax(ant[:,0])
    length = stop - start
    ant = np.roll(ant, -start, axis=0)[:length]
    ant = np.vstack([[-180, -90], ant, [180, ant[-1,1]], [180, -90]])
    rest = world[np.logical_not(antarctica)]
    w = np.vstack([rest, [np.nan, np.nan], ant])
    ax.set_facecolor('lightblue')

    ax.fill(w[:,0], w[:,1], color='grey', alpha=1)
    ax.axis('equal')
    ax.set_xlim(-180, 180)
    ax.set_ylim(-90, 90)
    return fig, ax
fig, ax = plot_world_map()
j = ax.set_title("Simple Cylindrical Map")