The map $\pi_{mer}$ is well-defined and extends by continuity to the map $\pi:{X}^{an}\to B$. The set $B^{sm}$ (defined as the maximal open subset of $B$ on which the limiting metric is smooth) coincides with the set of $\pi$-smooth points. Two ${\bf Z}$-affine structures on $B^{sm}$, one coming from the collapse picture, another coming from non-archimedean picture, coinside with each other.