Top panel: Plot showing the difference in source velocity (V_lsr) and the velocity of tangent point (V_T), versus the difference in the velocity of the first absorption minimum (V_A) and the V_T. The diagonal and horizontal shaded regions represent the expected location of the near and far distance sources, respectively, while the solid line shows the approximate boundaries (Kolpak et al. 2003; Urquhart et al. 2012). The dashed diagonal line divides the darker triangular region in the lower left quadrant of the plot into two regions: sources above the line are more likely to be at a near distance, while those below are more likely to be at a far distance. Bottom panel: Plot showing the relation between the distance determined using the Bayesian method presented by Reid et al. (2016, 2019) and the near/far distance determined using the Reid et al. (2014) rotation curve. The red circles and blue stars represent the distances taken from literature and obtained distance for 53 H II regions, respectively. The solid black line shows the line of equality, and the gray shaded region represents ±1 kpc.