Return the temporal grid-hop distance (number of single-cell steps) between two temporal cells. Equivalently, the <-> operator returns the same distance. The two operands are synchronised over their shared time axis.

th3GridDistance(th3index,th3index) → tbigint

th3index <-> th3index → tbigint

SELECT th3index '880326b885fffff@2001-01-01'
   <-> th3index '880326b88dfffff@2001-01-01';
-- 1@2001-01-01

Convert between a temporal cell and a temporal local (I, J) coordinate pair relative to an origin temporal cell. The local coordinate is exposed as a tgeompoint with the I axis in the x slot and J in y.

th3CellToLocalIj(th3index,th3index) → tgeompoint

th3LocalIjToCell(th3index,tgeompoint) → th3index