As often with Spanish-made charts, this one is extremely rare; the map can be said is divided in two: the larger portion is dedicated to mapping the region of the Sea of Marmara and the Black Sea, whilst the smaller one is dedicated to the city of Constantinople (Istanbul), the channel of the Black Sea or the Thracian Bosporus. As a navigational aid the chart is terrific, as it shows the depths by soundings, and names the harbors, towns, and fortifications along the coastline.
The chart was commissioned by the famed Principe de la Paz Manuel Godoy y Alvarez de Faria (1767 – 1851), Spanish nobleman and politician, given such title flowing the negotiation of Peace of Basel (1795), to the Spanish sailor and cartographer Dionisio Alcala, who can be considered one of the foremost cartographers and chart-makers of Spanish, having worked with Vicente Tofiño, Malaspina, and having been the first to chart Vancouver Island during the expedition in search of the Northwest Passage.
One copy in the United States, at the University of South Carolina, one other copy located at the Biblioteca Nacional de España. According to OCLC.