autometry
/ɔːˈtɒmɪtri/noun
1†The determination of some dimensions of a figure (such as area) from other, measured dimensions (such as lengths of radial lines) (obsolete ). Also: the expression of the dimensions of parts of a human body in terms of its height. rare.
2 Mathematics. An isometry of a metric space to itself.
Origin
Early 19th century (in an earlier sense). From auto- + -metry.