Guys, we really need to comply with FAA airspace restrictions. The stuff that DJI is good for situational awareness, but don't put any confidence in it that you are in compliance with FAA rules. For instance, DJI shows that it is fine to fly over the Trinity River in downtown Dallas. But an examination of the airspace shows that is Class B (most restrictive) all the way to the ground. You have to have explicit permission to fly in this airspace and squawk a unique identifier through a transponder, which we cannot do with the Phantom. Therefore, according to the FAA, you can't fly a drone there, not even 10' off the ground. I called Dallas Love Tower the other day to see if I could somehow work around this. I was told 'Not only no, but hell no.'
There are tons of resources online to learn about airspace. Skyvector.com is a great website to reference for airspace around where you want to fly. It will show your phones position relative to the airspace, as well as TFRs.