If you are in a corridor, tunnel, conduit, jeffries tube, sewer, road, bridge, long field, etc. and you point to that transitional location that would take you outside the bounds of that named place you are in, you are pointing to the {qa’rI’}.
If you are outside of the corridor, tunnel, jeffries tube, or sewer, pointing to the transitional location that would take you into that named space, you’d be pointing to a {DIn}. Does {DIn} work for the transitional area to a road, bridge, or long field? Maybe, maybe not. I wouldn’t think so.