Geodesic towers

Also called geodesic chimneys

Usually made of brick or stone, oblong in shape, it often resembles a factory chimney. On the ground, in its center, a geodesic terminal is sealed, made accessible from the outside by one or more openings at the base of the building. The height of the structure makes it possible to pass a long plumb line inside, which is thus protected from the wind, in order to position the theodolite directly above the geodesic terminal that it surmounts, and thus take precise measurements. with other known geodetic points.