It’s a bit more control beyond Localization.
Basically say you get a CAD file WITHOUT any sort of control or global coordinate system. It also comes in at a wacked out scale, you can SCALE those objects down or up to match real world scale. Then say you need to TRANSLATE the center point to the center somewhere on site (or any point)… but also you want to ROTATE it say 30 degrees? Voila!
Microsurvey FieldGenius does all this btw.