Rigobert Bonne; 1729-1793.

Bonne, a trained mathematician, was appointed Hydrographer to the King.
He took over the responsibility of the french hydrographic institute ("Dépôt de la Marine") after the death of Bellin in 1772. This position enabled Bonne to the unequaled access to prime mapping data, which he could use successfully for his own private business interests.
He followed in the steps of the french school of cartographic minutiae and geographic accuracy. As such he produced, often in collaboration with other mapmakers, a large number of excellent sea charts.
His name is generally associated with a type of equal area projection he often used after 1757.
Of note, his participation (with Janvier and Rizzi-Zannoni) to Jean Lattré's 1762 "Atlas Moderne". But he is most well known for the wealth of maps he prepared for Guillaume Thomas François Raynal's "Atlas de toutes les parties connues du globe terrestre" (1780), and also for Nicolas Desmaret*'s "Atlas Encyclopédique" (1787, re-issued in 1827).

* Desmaret: of engineering fame for the first recorded design of a tunnel between France and England in 1751. nd Whittle.

Carte de l'empire de la Chine et du royaume de Corée...

This map (approx. 9 3/16"X 12 9/16"), as said in the cartouche, is only showing the eastern part of other maps prepared around 1780 (partie orientale).
The present item is dated 1786, but seems to have been printed for the 1787 "Atlas Encyclopédique". The delineation of Japan is very reminiscent of Bellin's, while the coastline of Korea is still strongly influenced by d'Anville'much earlier works.
All in all it is a very antiquated representation of the area.
Notice Tokyo (Jedo), the strange shape of Okinawa (Lekeyo), Pyongyang (Pinyan), Shanghai ..not yet important enough to be shown! (at that time a small harbor under the control of the nearest large town: Suzhou (Su Tcheu)).
No text on verso.