Correspondence between spectroscopic redshifts and TOPz photo-z estimations. Upper panel: the colour of the hexagons denotes the number of galaxies on a logarithmic scale. The one-to-one relation is drawn with a diagonal dashed black line. See Fig. 19 for the distribution around the one-to-one line. From left to right, the three panels include galaxies in different Z-band magnitude ranges: m_Z < 18, 18 < m_Z < 19 and m_Z > 19, respectively. Lower panel: photo-z accuracy as a function of spectroscopic redshift. The three panels are comprised of galaxies at the same magnitude ranges as on the top panels, and hexagon colours are similar. The coral line shows the median accuracy in different spectroscopic redshift bins, and the lower and upper white dash-dot lines indicate the 10 and 90% data quantiles, respectively. The grey area at the bottom-left of each panel indicates an exclusion zone where ζ_phot would be negative, causing the increase in the median (coral line) when approaching redshift zero.