Mollweide projection of our constructed X_CO map. Our global value for X_CO is 2 × 10²⁰ K km s⁻¹ cm⁻², which is consistent with previous estimates. X_CO varies by orders of magnitude within a few tens of arcminutes. In the surroundings of molecular regions, X_CO ~ 10²¹ cm⁻² (K km s⁻¹)⁻¹, while in the inner parts of clouds it decreases to X_CO ~ 5 × 10¹⁹ cm⁻² (K km s⁻¹)⁻¹. In the Galactic center, X_CO increases significantly due to the high optical depths in that region. The angular resolution is 16′, and NSIDE=1024.