It was decided to measure, using the method of triangulation with sightings made with the Borda repeating circle which was an extremely accurate new instrument, that part of the meridian between Dunkerque and Barcelona.
Otsustati, et mõõta, kasutades meetodit triangulatsioonipunktiga koos vaadeldes tehtud Borda korrates ringi, mis oli väga täpne uus vahend, et osa meridiaani vahel Dunkerque ja Barcelona.