hypsograph--prophetes.ai

hypsograph

hypsograph
  (ˈhɪpsəʊgrɑːf, -æ-)
  [f. hypso- + -graph.]
  = hypsographic curve.

1937 Geogr. Jrnl. XC. 60 The verticality in all the hypsographs at low elevations is explained by the high coastal cliffs and deep V-shaped valleys which prevail.

Oxford English Dictionary