Maps of strength of non-axisymmetric components in the combined (bar and spiral arms) today’s MW model (noted as MW1 in Sect. 4). Color scales map the ratio between radial (left) and tangential (right) force resulting from the non-monopole part of the gravitational potential to the radial force due to the monopole part at the same radius. Maps are plotted for the Galactic plane.  ⊙  symbol marks the position of the Sun.