Originally posted by Moonshine Fox:

There is a build item you get, generally early in the Black Forest, that lets you record your map/fill out your map from someone else’s recording. This will however not share pins (unless that’s changed since I took my break a few months back).

It does share pins now (they are a light shade of gray instead of being white). It does not share the skulls that mark points of death. If you need the help of a teammate to recover your gear you have to mark the spot with a different pin and upload again.