Python conversion between coordinates

Are there functions for conversion between different coordinate systems?

For example, Matlab has [rho,phi] = cart2pol(x,y) for conversion from cartesian to polar coordinates. Seems like it should be in numpy or scipy.

How do you change the projection in Python?

Changing the projection is really easy to do in Geopandas with . to_crs() -function. As an input for the function, you should define the column containing the geometries, i.e. geometry in this case, and a epgs value of the projection that you want to use. Let's see how the coordinates look now.

Using numpy, you can define the following:

import numpy as np  def cart2pol(x, y):     rho = np.sqrt(x**2 + y**2)     phi = np.arctan2(y, x)     return(rho, phi)  def pol2cart(rho, phi):     x = rho * np.cos(phi)     y = rho * np.sin(phi)     return(x, y)