in qua itinera Regia et alia notabiliora accurate denotantur per A. Maas ; reductio mappæ haijus a majore in hanc monirem formam facta est per Iohannem Petrum van Ghelen.Covers portions of Uzbekistan, Kazakhstan, Afghanistan, Turkmenistan, Russia, Azerbaijan and Iran.Relief shown pictorially. Depth shown by soundings.Includes notes and ill."Cum Priv. S. C. M.".