The geographic analysis of federalism requires a reexamination of methods and approaches in political geography which have, until now, contributed little the furtherance of understanding of the geographic consequences of the evolution of Canadian constitutional law. The division of powers, territories, allegiances and technocracies (vertical, i.e., federal-provincial and horizontal, i.e., provincial-provincial) are organized around a "structural sharing" that constitutes the very essence of a geography of federalism.