Maps of footpoint loops spanning all geometries. Shown are the coordinates of the footpoints of the magnetic field lines which are potentially visible for a LOS characterized by viewing angle θ_ob, as it passes through a dipole field inclined to spin axis by an angle α. The line colors reflect the observing frequencies shown in Fig. 15. The blue loop corresponds to emission seen at WSRT frequencies ν_hi = 1300 MHz, coming from chosen emission altitude r_hi = 5R_NS; while the red loop contains the footpoints visible in the lower GMRT band ν_low = 430 MHz, from r_low = 15R_NS. The dots mark the quarters of the magnetar rotation. The coordinate system is centered on the magnetic dipole axis. The letters indicate the sets of geometry angles with emission regions plotted in Fig. 17.