English: Map of France corrected by order of the King based on the observations of members of the Academy of Sciences. The light outline represents the previous map, which is be that of Nicolas Sanson, presented to the Dauphin of France in 1679, see File:A-3-37-57-France-Antiqua.jpg. The heavier outline is that of the Academy map, and indicates that the French coastline is substantially to the east of earlier mapping, and that France is somewhat smaller. Map has been colour-corrected from the original source. The map has been published a number of times, for details, see: Gallois, L. (1909). "L'Académie des Sciences et les Origines de la Carte de Cassini: Second article". Annales de Géographie 18 (100): 292. The map is commonly known as the Carte de Cassini as Dominique Cassini led the surveying operation.

Description taken from (1729). "Pour la Carte de France corrigée sur les Observations de MM. Picard & de la Hire". Mémoires De L' Académie Des Sciences 7 (1): 429-430. and translated from the French text here by Google Translate:

"It has been thought appropriate to give here in the following Map a result of the Observations which have been made for its correction, so that one may see in a single Figure all that they contain, and where they are. different from what is placed in the Map that Mr. Sanson, one of the most illustrious Geographers of this century, presented to Monseigneur the Dauphin in 1679. What has been marked in punctuated lines, is copied exactly on this Map , which was reduced to half. The names of Towns whose position is also taken from this Map are written in italics; the correction of the position of the coasts which is deduced from the preceding Observations, is marked with a simple line with a little shading on the side of the Sea, as is usually done; & the names of the Towns whose position is corrected, are written in Roman characters. The degrees of latitude or heights of Pole are marked on both sides in the border, so that it is easy to see the corrections that must be made to the heights of Pole of the places which are marked. As for the degrees of longitude, which are also used to know the difference of the Meridians of the places proposed, we have marked them in the same border at the top & at the bottom; but we began the division of it at the Meridian which passes through the Observatory going to the Levant & the Couchant, so that the difference in longitude of the places marked in this Map, appears the same as that given in the Observations which have been made. in these same places, & by correspondence at the Observatory. It was thought that we should not mark the longitudes as they are ordinarily in the Maps, starting at the Isle of Iron, as it has been established, because we did not know the exact position of this Isle at the regard to the Observatory.

M. Sanson's Map has been proposed here, as the fairest of all the Moderns which have been given to the Public, only to show how much the Observations are different from the Relations and the Memoirs on which the most excellent Geographers are obliged to work. , & that we should not attribute to them faults such as can be seen in this Map, concerning the position of the Côtes de Languedoc & de Provence, which are very far from the truth for the heights of Pole that the can be observed quite easily."