Dust extinction map illustrating the masked filamentary structure. The spine of the filament is outlined by a prominent red curve, and the thin red lines indicate the locations of perpendicular cuts. Blue circles represent the peak pixel intensity along each cut. The orange vectors represent optical (S/N≥5) and infrared (S/N≥3) polarization segments. The cyan vectors are projections of all the orange polarization vectors onto the spine. Each polarization vector was projected by finding its closest point on the spine and shifting it accordingly.