Left: Angle of the magnetic field, ﹩\gamma _{M}=\gamma _{\mathrm{PA}\,}+90^{\circ }﹩, derived from the synchrotron radiation in the K‐band map (smoothed with a 4° beam) shown in Fig. 3. (We do not distinguish between ±180° in the field direction.) The predominant low Galactic latitude magnetic field direction is parallel to the Galactic plane (﹩\gamma _{M}=90^{\circ }﹩) and thus the synchrotron (and dust) polarization directions have ﹩\gamma \approx 0^{\circ }﹩. In the North Polar Spur region, the magnetic field is perpendicular to the Galactic plane corresponding to ﹩\gamma _{M}\approx 0^{\circ }﹩ or 180°. Note the large‐scale coherency of the field. Right: Predicted magnetic field direction given by a simple model of the electron distribution and the logarithmic spiral arm model (eq. [9]) for the magnetic field.