  The orientation-dependence of thin-crystal lattice fringes can be gracefully
quantified using fringe-visibility maps, a direct-space analog of Kikuchi maps.
As in navigation of reciprocal space with the aid of Kikuchi lines,
fringe-visibility maps facilitate acquisition of 3D crystallographic
information in lattice images. In particular, these maps can help researchers
to determine the 3D lattice parameters of individual nano-crystals, to ``fringe
fingerprint'' collections of randomly-oriented particles, and to measure local
specimen-thickness with only modest tilt. Since the number of fringes in an
image increases with maximum spatial-frequency squared, these strategies (with
help from more precise goniometers) will be more useful as
aberration-correction moves resolutions into the subangstrom range.
