Geodesic point

On the Polderdijk, directly opposite the farm "'t Meeuwenhof", there is a striking cast-iron pole on a pedestal of brick and bluestone with the inscription "station geodesique 1853".
A geodetic signal or geodetic point is a well-known point from which one starts when measuring distances for mapping a certain region.
The iron pole along the Polderdijk is the geodetic signal of Zandvoorde, which is part of a mid-19th-century geodetic network, more specifically a triangular network whose angles were measured and whose scale was determined by the measurement of three bases in Belgium, namely Ostend, Lommel and Hamipré.

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