The power cores are located in the lower portion of the map, and on the top section. (gamergeddon.com)
For example, most of the southern and central portions of the map are made up of deserts and plains with winding rivers and small islands. (gamecrate.com)
It's not that much of a big deal though, since it was still a good portion of the map and will keep you focused on the objective at hand. (gamingunion.net)