a) Projection-corrected vector magnetic field, where arrows represent the horizontal components. b) Radial magnetic field overlaid on the 3600 Å contour (yellow and green lines), the polarity inversion line (dash-dotted lines), and the NLFFF field lines (blue and red lines). The magnetic field has been corrected for projection effects. The yellow lines indicate the location of the WLF, while the green ones indicate the sunspot place.