Results of the bridge-detection algorithm after filtering. The solid red lines denote detected arcs that were identified as bridges. The dashed dark red lines denote arcs that were identified as PAFs. The seed point of each arc is shown in magenta. Manually designated arcs are plotted in green. The white contours delineate the validity region of the Vogt et al. (2011) JRM33 flux-equivalence mapping along closed field lines.