Distribution of photo-z over spec-z, where the full sample is shown in grey, and the shaded areas represent the fourth tomographic bin listed in Table 2 for photometric and spectroscopic redshift (orange and purple bands, respectively). Overlaid are 1, 2, and 3σ completeness contours for the two selection strategies: photo-z binning within the SOM (orange) and mean spec-z binning per SOM cell (purple).