Integrated intensity maps of N₂H⁺ (1−0) (top) and C¹⁸O (2−1) (bottom) emission from the PdBI (left), combined (middle), and 30m (right) datasets for L1448-2A. The white crosses represent the positions of the binary system determined from the 1.3 mm dust continuum emission. The black cross represents the middle position between the binary system. The clean beam is shown by an ellipse on the bottom left of each map. The black lines represent the integrated intensity contours of each tracer starting at 5σ and increasing in steps of 25σ for N₂H⁺ and 10σ for C¹⁸O (see Tables B.3 and B.4). Be careful, the spatial scales of the maps are not uniform in all panels.