This Web-site employs cookies to enhance your practical experience. We'll think you are Okay using this type of, however you can choose-out if you want. Cookie settingsACCEPTDutch mathematician Willebrord Snellius (a.k.a. Snel van Royen) introduced the modern systematic usage of triangulation. In 1615 he surveyed the distance from Alkmaar to Breda,