Distribution of different observables within the 3″ SDSS fibre. We show in three columns three different ranges of redshift. We present galaxies of the DPS which are classified as double SF in red and galaxies classified as SF of the NBCS in black (see Sect. 3.1) In the top row we show the difference in absolute r-band magnitude of the total galaxy and the 3″ SDSS fibre. The colours are Galactic dust- and k-corrected (Chilingarian et al. 2017). In the second row we present the ratio of the radii comprising 90% and 50% of the Petrosian luminosity (Petrosian 1976) approximating the central brightness in comparison to the total galaxy. We show the star formation ratio of the 3″ SDSS fibre SFR_fibre in the third row and the ratio between fibre and total star formation (SFR_fibre/SFR_total ) in the bottom row (Brinchmann et al. 2004).