HI emission from the Galactic All Sky HI Survey (GASS; McClure-Griffiths et al. 2009) for a larger region of the outer Galaxy covering 215° < ℓ < 280° indicating the integrated brightness temperature between − 5° < b < 1.5°. Overplottedare the positions of the spiral arms from Reid et al. (2014, 2019), and Vallée (2015) as dashed, dotted, and dash-dotted lines, respectively. The spiral arms and local emission as determined in the present work are marked by the solid lines. The dotted gray lines mark galactocentric radii at 10 and 15 kpc. the solid magenta ellipse marks the position of the Galactic supershell GSH 242-3+37. The light blue area framed by the blue dotted lines marks the area of the present work.