After a casual reading, it appears that God, through the prophet, is warning Edom of impending doom. He is going to shift the balance of power in the region and divide the land amongst foreign invaders. Clearly, it is implied that God is behind every power shift and nothing will happen that He does not approve first. However, the prophet makes one final statement at the end of the book that takes the concept and stretches it further.
"...but the kingdom will be the Lord's."
When we draw boundary lines, we divide God's kingdom amongst ourselves. France, England, and Spain mean nothing in God's eyes. Each of those countries are subjected to the jurisdiction of the Almighty, for within each of those countries reside subjects to the Almighty. Even though countries are ruled by Presidents, Monarchs, Prime Ministers, and Dictators, this earth is a kingdom. That kingdom is ruled by the King immortal, invisible.—Obadiah 21
If the redrawing of the map pleases the king, then it will be done.
If the King requires obedience, let His will be done.