Map of Paris, published in 1788, by Cesar Francois Cassini de Thury. This map was based on triangulation surveys and is part of the second map of France produced by Cassini. In 1744, along with Jacques Phillipe Maraldi, he had published the first accurate national topographical map of the country. The second map was not finished before Cassini's death in 1784, but his work was continued by his son Dominique Cassini.