If you look up Kennedy airport on google earth and orientate your view so that the longest runway is aligned east west that is Rwy 31L and the one that had noise sensitive departures and used by Concorde most of the time.
Basically all aircraft departing that runway towards NYC turn left briskly after take off and continue the left turn until the break off ona heading appropriate to their onward route. in Concordes case heading for the N Atlantic tracks it is onto pretty much a reciprocal heading -basically taking it our over Jamaica bay almost as soon as it passes the end of the runway and therefore not overflying any built up area. Once on the reciprocal heading it would be radar vectored to onward tracks.
Dont have a diagram as such but hope it helps and it was mostly where i saw Concorde depart from most of the time.
FYI this link is a description of this procedure from the flight deck point of view, note how low they start the left turn
|PB