I hate this graphic. Should we consider the 3rd dimension as well? I mean, the "thickness" of the barrel is much bigger behind e.g. UAE than Oman. From the numbers it seems we shouldn't.

But the boundary follows the arc on the top and bottom, so it's definetily projected to the half surface of a cilynder, but the voronoi lines are straight, but they should curve just like the top and bottom.

Data is beautiful impossible to interpret

That's an interesting type of visualization. Is there a name for this type?