No problem. Some topics are harder to find than others, and some are outdated anyway.
I must be having one of my dense mornings, either that or we’re speaking on crossed wires. Here’s a location in my list of locations;
I can craft that location into a Location Marker, like so;
The Marker is then put into my inventory. I can trade this with other players, sell it, throw it at a Spitter, or consume it;
The location will then turn up in the location list of whoever consumes it;
Is that what you mean?