# Fig. 1
fig = plt.figure()
ax = fig.add_subplot(projection=ccrs.Robinson())
ax.set_global()
ax.coastlines()
ax.gridlines(draw_labels=['left'], x_inline=False,
             ylocs=np.linspace(-90,90,7))
ax.set_title('Fig. 1')

# Fig. 2
fig = plt.figure()
ax = fig.add_subplot(projection=ccrs.Robinson())
ax.set_global()
ax.coastlines()
ax.gridlines(draw_labels='y', x_inline=False,
             ylocs=np.linspace(-90,90,7))
ax.set_title('Fig. 2')

# Fig. 3
fig = plt.figure()
ax = fig.add_subplot(projection=ccrs.Robinson(180))
ax.set_global()
ax.coastlines()
ax.gridlines(draw_labels='y', x_inline=False,
             ylocs=np.linspace(-90,90,7))
ax.set_title('Fig. 3')

# Fig. 4
fig = plt.figure()
ax = fig.add_subplot(projection=ccrs.Robinson())
ax.set_global()
ax.coastlines()
ax.gridlines(draw_labels='y', x_inline=False,
             ylocs=np.linspace(-90,90,7),
             xlocs=np.linspace(-180,180,7), xlim=(-180,0))
ax.gridlines(draw_labels=False,
             ylocs=np.linspace(-90,90,7),
             xlocs=np.linspace(-180,180,7), xlim=(0,180))
ax.set_title('Fig. 4')