Coverage of the SEDIGISM and GRS surveys, shown respectively in orange and green shading, overlaid on the top down image of the Milky Way produced by Robert Hurt of the Spitzer Science Center in consultation with Robert Benjamin (see Churchwell et al. 2009, for more details). The large and small cyan circles indicate the Solar Circle and the position of the tangent points (maximum radial velocity), respectively, while the dashed yellow lines demarcate the region selected as the science demonstration field (see Sect. 2). The position of the Sun is indicated by the ⊙ symbol.