Depth and wavelength coverage of DES and Euclid surveys. Upper panel: g, r, i, and z (from left to right) filters are indicated with thin dashed (blue, green, red and black) lines. riz, y, J, and H (from left to right) Eclid filters are indicated with thick solid (blue, green, red, and black) lines. The horizontal tick indicates the  ~10σ depth. Bottom panel: wavelength coverage of the filters for redshift bins, where galaxies are brighter than the  ~10σ depth. The shaded (yellow) region marks the wavelength sampling of g − r at z < 0.08.