Diagnostic diagrams for [O III]5007/Hβ vs. [N II]6583/Hα and [OI]6300/Hα for the control sample galaxies. For each galaxy, the top panel shows the BPT line-ratio map, while the bottom panel shows the corresponding spatially resolved BPT diagram. Lines are included from Kauffmann et al. (2003, K03), Kewley et al. (2001, K01), and Sharp & Bland-Hawthorn (2010, SB10) to separate star-forming (red), composite (orange), AGN (green), and LINER (cyan) galaxies. Only spaxels with a S/N > 3 in all of the emission lines involved are shown. Adopting a S/N > 4 does not modify these plots.