Results of the inversion for the 857 GHz band. From top to bottom are: observed emission; modelled emission; atomic contribution; molecular contribution; ionised contribution; dark gas contribution; synchrotron contribution; residual; and relative residual. All images except for the residual maps are at the same intensity scale. The centre and anti-centre regions have been masked, as the kinematic distance method is inapplicable to these regions. Areas where no CO observations are available have also been masked.