POL-2 polarization segments sampled on a 7″ grid overlaid on 850 μm dust continuum, sampled on a 4″ grid, of the entire SDC13 region with nearby compact clouds. The yellow and black segments display the larger than 3σ and 2–3σ polarization detections. The lengths of the segments are proportional to the polarization fractions. The yellow scale bar at the left bottom shows a 10% polarization fraction. The white circle at the right bottom corner is the JCMT beam size of 14″. The rms noise of Stokes I is ∼1–5 mJy beam⁻¹ depending on the pixel intensities, within the central 3′ area.