Images (12.5° × 12.5°) of important CO emission regions for CO J = 1 → 0: Taurus (left column), Orion (middle column), and Polaris (right column), at 20′ resolution. The first row shows the Dame et al. (2001) map (unobserved pixels are shown in gray), second row shows our xGNILC map, third row shows the Planck TYPE 1 map, and in the last row we show the difference map (Planck TYPE 1 - xGNILC). We smoothed these maps to 20′ to suppress the noise in the Planck TYPE 1 map. We highlight the strong consistency between xGNILC maps and Dame maps.