Logarithmic emission line map of the Hα (top-left), Hα continuum (top-middle), [N ii] λ6584 (top-right), [S ii] λ6717 (bottom-left), EW(Hα) (bottom-middle) and extinction c(Hβ) (bottom-right). Logarithmic emission-line fluxes in units of erg cm^-2 s^-1, the logarithmic continuum flux density is in erg cm^-2 s^-1Å^-1 and equivalent widths in Å. Overlaid are the Hα flux contours. In the top-middle (Hα continuum) panel we indicate the different apertures used in this study for regions 1−3, respectively.