Earth 3D plot example

utilities/earth.py

+### 3D plot
+fig = plt.figure(figsize=(9,9))
+ax = fig.add_subplot(1,1,1, projection='3d')
+u, v = np.mgrid[0:2*np.pi:30j, 0:np.pi:30j]
+# u = phi (longitude)
+# v = theta (latitude)
+# R = earth radius
+x_earth = R*np.cos(u)*np.sin(v)
+y_earth = R*np.sin(u)*np.sin(v)
+z_earth = R*np.cos(v)
+# R,u,v (spherical) -> x,y,z (cartesian)
+# Plot the earth #
+ax.plot_wireframe(x_earth, y_earth, z_earth,cmap='ocean', facecolor='none')
+all_positions = np.array(all_positions)
+# Plot positions #
+ax.plot3D(all_positions[:,0],all_positions[:,1],all_positions[:,2],color='r')
+# Set axes limits
+ax.set_xlim3d(-R-5000000,R+5000000)
+ax.set_ylim3d(-R-5000000,R+5000000)
+ax.set_zlim3d(-R-5000000,R+5000000)