borrowed from New Latin analysis sitūs "analysis of position"
The phrase was used by Gottfried leibniz, as in the paper "De analysi situ," Leibnizens mathematische Schriften, 2. Abteilung, Band I, edited by C.I. Gerhardt (Leibnizen gesammelte Schriften, 3. Folge, 5. Band, Halle, 1858), p. 178.