His chief works are: "La méridienne de l’Observatoire Royal de Paris" (1744), a correction of the Paris meridian; "Description géométrique de la terre" (1775); and "Description géométrique de la France" (1784), which was completed by his son ("").
1744 je začel izdelovati velik topografski zemljevid Francije, ki je izšel leta 1746 in 1747 na 18. listih v merilu 1:870.000.