There are a few ways to figure out your spawn location.
The first trick is you can do is load the map up in skirmish mode and turn debug on. Start the game without AI and use reveal all map. This way you can get a general idea of how the map works. (If you are a competitive player)
The second trick is when you spawn randomly scroll your screen to the corner at one side. If the screen stops scrolling your on that side.
However, this is more prone to TD as the natural starts give you units to work/scout with.
Help Newbies
Make OpenRA more noob friendly by enabling "Explored Map"
