Bellin made maps for many travel accounts but he worked for the most part of his life making nautical charts under the auspices of the French naval authorities. It is therefore not surprising that the shape of Iceland on this map is of the type that was common on many such charts.
The map is from an Italian edition of Jean François de la Harpe's collection of travel stories which was based on Prévost's Histoire Générale des Voyages but Bellin had created maps for the latter.