Open mike 09/02/2021
McFlock 10.1.1.1.1.1 Well, "quadrant" is a 2-dimensional division where the X and Y axes go into negatives. "Octant" applies to the equivalent for a cube. But with a sphere (although technically I saw on QI that the term "oblate spheroid" is a more precise description of the Earth) the Z axis (depth/altitude) seems less meaningful, and with map geometry were generally discussing 2d represeantations of a 3d object – the surface, not the full sphere. So Id go with "quadra...
Source: thestandard.org.nz