Results of the cross-matching preformed between the ATLASGAL, BGPS and MMB catalogues. In the upper left panel we plot the peak fluxes for BGPS and ATLASGAL sources found within a matching radius of 40′′. In the upper right panel we compare the angular offsets in Galactic longitude and latitude between the ATLASGAL and BGPS catalogues. In the two lower panels we present plots showing the angular offsets in ℓ and b between matched MMB-ATLASGAL (left) and MMB-BGPS (right) sources. The dashed lines overplotted in the in the upper right and lower panels show the zero offset positions in ℓ and b, while the blue crosses indicate the mean offset of the matched samples.