 It is particularly confusing south of Bangweulu, where there is not one single clear channel exiting the swamps but a tangled mass of channels in swamps and floodplains tens of kilometres wide, and the Italian King's line of longitude crossed them at multiple points.An Anglo-Belgian Boundary Commission was established in 1911 to survey the boundaries on the ground, resolve the problems and mark the border with posts and timber towers used for triangulation.The Italian King's ruler was moved west to a point where it did cut a clearly defined channel in one place.