Mafia Scatterplot?

Do anyone know if there has ever been a 'mafia scatterplot"? By this I mean does anyone know if anyone one has every taken the addresses of the known properties/businesses of known made guys (from FBI reports or other sources) and associates of the different families and superimposed them over a map of NYC or any other area that they infest. It would be interesting to see which are had the most mafia homes vs which had the most mafia businesses.