https://uk.mathworks.com/help/map/ref/map.geodesy.authaliclatitudeconverter.forward.html
forward - Convert geodetic latitude to authalic, conformal, isometric, or rectifying latitude -...
This MATLAB function returns the authalic, conformal, isometric, or rectifying latitude coordinates corresponding to geodetic latitude coordinates phi.
forwardconvertgeodeticlatitudeisometric