It marks the middle of the map, or the default start point of your ride.
Short post, I know, but there isn't really much more to say. To keep it from being a one-sentence post, I'll fill it with comments on how short my post is.
There, now it looks a little better. And you know, once you've got this far, it's too late to stop reading. You have to read every single word here, spending time that could be spent getting a drink, going to the toilet, reply to that MSN convo, or reading more interesting posts. But now, you're almost at the end, can't stop now. Just a little further...
Just a few more sentences...
There, that's the end.
Now, the post turned out a little more substantious than originally intended, but hey, this happens, right?
Good luck, TGW!