Left panels: [O III]λ5007/Hβ versus [N II]λ6584/Hα BPT diagram of all spaxels in the MEGADES sample for galactocentric distance cuts of (from top to bottom): < 0.25 kpc, between 0.25 and 0.5 kpc, between 0.5 and 1 kpc, and > 1 kpc. The size of each point depends on the S/N measured at the peak of the [N II]λ6584 line. The dashed, dotted, dash-dotted, and solid lines represent the Kewley et al. (2001), Kauffmann et al. (2003), Stasińska et al. (2006), and Espinosa-Ponce et al. (2020) demarcation curves, respectively. Right panels: Relationship between [O III]λ5007/Hβ and the velocity dispersion measured on the Hβ line for the same galactocentric distances shown in the left panels. The size of each point depends on the S/N measured at the peak of the Hβ line. Grey dots in the backgrounds correspond to all points in the sample.