Composite line maps of the NE (left panel) and SW (right panel) mosaics. The flux of each of the three lines of interest has been assigned a color: red shows H₂ (2.12 µm), green H₂ (2.22 µm), and blue H II (traced by Brγ, 2.17 µm). Line flux is estimated by our fitting procedure. Regularization ensures that the maps are smooth and provides for extrapolation (in particular, there is no gap anymore between the two fields). It actually also provides some extrapolation, but we cut the field-of-view to the initial one (except for the gap).