Pierre Méchain and Jean-Baptiste Delambre combined their measurements with the results of the Spanish-French geodetic mission and found a value of 1/334 for the Earth's flattening, and they then extrapolated from their measurement of the Paris meridian arc between Dunkirk and Barcelona the distance from the North Pole to the Equator which was 5 130 740 toises.
Méchain and Delambre combined their survey data with those of a Spanish-French geodetic mission to determine the Earth's flattening, which they found to be about 1/334. They then used this information to estimate the distance from the North Pole to the Equator by tracing the Paris meridian arc between Dunkirk and Barcelona.