Full-sky CO J = 1 → 0 maps (left) and their respective statistical error maps (right) in K km s^-1 units for the three types of Planck CO products. For display purposes only, the Type 1 and Type 3 maps are smoothed to 15′ to ease the comparison to the Type 2 maps. The error maps correspond to the non-smoothed product. The maps are in Galactic coordinates and follow the HEALPix pixelization scheme for N_side = 2048.