Reddit user, DaanLyb, is a clever chap. He's stitched together map images of Anthem taken from streams, to form a patchwork quilt of the Anthem world map. While there's no way of knowing (for now) how accurate this is, but by the looks of things, the play area is fairly significant. What'll be interesting to see is just how quickly you can traverse the terrain. It's evident based on the footage we've seen so far, that travel time is particularly quick.  With the likes of the Interceptor being particularly fast, there's the possibility that you could cover this play space in a very short period of time. On the flip side, if you're wielding the Colossus exosuit, things are more than likely to take a longer period of time. "Full" map below.