[ ] A separate page to aid in identifying on the fly. E.g. what color is it, what is it doing, key identifying marks, aircraft type.
[ ] A neighborhood (or rather region of DC) guide. E.g. The helicopters you're likely to see in Shaw/NoMa/Trinidad, another section for the ones you're likely to see in Dupont and U Street. Etc.
[ ] A google map showing all of the helipads
[ ] Section on Heliports (more info here), including a picture of Washington Hospital Center