Taking the time to familiarize yourself with the available information of an area is part of the FAA’s guidelines for preflight action (FAR 91.103). You should also familiarize yourself with terms and symbols used on the latest edition of these helicopter route charts.
The 4-color charts clearly delineate all current aeronautical information useful in areas where highly populated helicopter traffic occurs. You can easily pick out routes, NAVAIDS, obstructions in the area, and pertinent heliport descriptions and locations.
Click for map coverage.