Characteristics maps for five galaxies. Panels of the left column a: Observed surface brightness distribution in the galaxy image in sky coordinates (pixels). The surface brightness value is colour-coded. The circle shows the kinematic centre of the galaxy, the line indicates the position of the major kinematic axis of the galaxy, and the ellipse is its optical radius. Panels of the middle column b: Line-of-sight velocity field. Panels of the right column c: Distribution of O/H in the galaxy image.