Human-Centered Concave Planetary Reference (HccPR): Irreclimate, Spatial Anatomy, and the Reversal of the Planetary Point of View

This paper introduces the Human-Centered Concave Planetary Reference (HccPR), a conceptual and geometric framework that reverses the conventional external viewpoint of planetary representation. By applying a radial inversion to an azimuthal equidistant projection, the Earth is no longer represented as an object observed from space, but as a concave environment perceived from within, with the observer placed at the center of reference. This shift reveals a structural blind spot in contemporary climate and spatial models: the persistence of irreversible planetary processes that remain poorly perceived under convex, externalized representations. To describe this regime, the concept of Irreclimate is introduced, along with its structural anchor, the Irreclimate Point. Inspired by anatomical reasoning, the paper proposes a conceptual spatial anatomy of the planet, treating flows, thresholds, and nodes as functional organs of a living system. A case study focusing on the Canada–Australia axis illustrates how concave planetary perception reshapes geopolitical and ecological coordination. The HccPR framework does not propose a new map, but a new reference system for understanding, governing, and inhabiting an irreversible planetary condition.