  We present spatially resolved BPT mapping of the extended narrow line regions
(ENLRs) of seven nearby Seyfert 2 galaxies, using HST narrow band filter
imaging. We construct the BPT diagrams using $\leq$ 0.1" resolution emission
line images of [O III]$\lambda$5007, H$\alpha$, [S
II]$\lambda$$\lambda$6717,6731, and H$\beta$. By mapping these diagnostic lines
according to the BPT classification, we dissect the ENLR into Seyfert, LINER,
and star-forming regions. The nucleus and ionization cones are dominated by
Seyfert-type emission, which can be interpreted as predominantly
photoionization by the active galactic nucleus (AGN). The Seyfert nucleus and
ionization cones transition to and are surrounded by a LINER cocoon, extending
up to $\sim$ 250 pc in thickness. The ubiquity of the LINER cocoon in Seyfert 2
galaxies suggests that the circumnuclear regions are not necessarily
Seyfert-type, and LINER activity plays an important role in Seyfert 2 galaxies.
We demonstrate that spatially resolved diagnostics are crucial to understanding
the excitation mechanisms in different regions and the AGN-host galaxy
interactions.
