Return the temporal H3 vertex at the given vertex number (0–5 for hexagons, 0–4 for pentagons)

th3CellToVertex(th3index,integer) → th3index

SELECT th3CellToVertex(th3index '871fa44a8ffffff@2001-01-01', 0);
-- 2071fa44a8ffffff@2001-01-01

Return the temporal geodetic coordinates of each vertex in a trajectory

th3VertexToLatlng(th3index) → tgeogpoint

SELECT asText(th3VertexToLatlng(th3CellToVertex(th3index '871fa44a8ffffff@2001-01-01', 0)), 6);
-- POINT(4.280027 50.807655)@2001-01-01

Return a temporal boolean stating at each instant whether the value is a valid H3 vertex

isValidVertex(th3index) → tbool

SELECT isValidVertex(th3CellToVertex(th3index '871fa44a8ffffff@2001-01-01', 0));
-- t@2001-01-01