Filaments identified with DisPerSE (in green). Purple data points mark the locations along the filament of the average radial profiles that contributed to the analysis. The gray-scale image is the EM, computed from the 1.4 GHz continuum intensity assuming optically thin thermal emission, and is the image on which the filaments are identified. Red (blue) boxes encompass select filaments identified with (without) a known massive star that locally contributes to ionization.