Whether the cell has a geographic pole strictly inside it, rather than on
its boundary.
True only for the two polar cube faces at level 0. Their four corners all
sit at about 35.26 degrees latitude while the cell itself covers the pole,
so the ring circles the globe and any polygon built from it describes a band
rather than a cap. From level 1 down, a pole is always a shared corner of
four cells and needs no special treatment.
Whether the cell has a geographic pole strictly inside it, rather than on its boundary.
True only for the two polar cube faces at level 0. Their four corners all sit at about 35.26 degrees latitude while the cell itself covers the pole, so the ring circles the globe and any polygon built from it describes a band rather than a cap. From level 1 down, a pole is always a shared corner of four cells and needs no special treatment.