NGC 4298 maps. Top left: ¹²CO(1–0) Moment 0 map, contours: 0.5, 8.8, 17.1, 25.4, 33.7, 42, and 50.3 M_⊙ pc^-2. Top right: ¹²CO(1–0) Moment 1 with 1035 ≤ v ≤ 1235 and Δv = 20 km s^-1. Middle left: ¹²CO(2–1) Moment 0 map, contours: 0.5, 7.6, 14.8, 21.9, 29, and 36.2 M_⊙ pc^-2. Middle right: ¹²CO(2–1) over ¹²CO(1–0) ratio. The beam size is shown in the bottom left of each panel. Bottom panel: channels map of ¹²CO(1–0) with 985 ≤ v ≤ 1275 km s^-1 and Δv = 10 km s^-1.