Utsaha sané pinih luwih sekadi Struve Geodetic Arc nglintangin Eropa sisi Kangin (86855) miwah Great Trigonometrical Survey of India (80287) suéan, sakéwanten ngasilang estimasi sane pastika pisan saking wentek ellipsoid jagaté.
More ambitious undertakings such as the Struve Geodetic Arc across Eastern Europe (1816-1855) and the Great Trigonometrical Survey of India (1802-1871) took much longer, but resulted in more accurate estimations of the shape of the Earth ellipsoid.