Geography (Ptolemy)
The Geography, also known by its Latin names as the Geographia and the Cosmographia, is a gazetteer, an atlas, and a treatise on cartography, compiling the geographical knowledge of the 2nd-century Roman Empire. Originally written by Claudius Ptolemy in Greek at Alexandria around 150 AD, the work was a revision of a now-lost atlas by Marinus of Tyre using additional Roman and Persian gazetteers and new principles.
Its translation into Arabic by al-Khwarismi in the 9th century was highly influential on the geographical knowledge and cartographic traditions of the Islamic world. Alongside the works of Islamic scholars—and the commentary containing revised and more accurate data by Alfraganus—Ptolemy's work was subsequently highly influential on Medieval and Renaissance Europe.
Manuscripts
Versions of Ptolemy's work in antiquity were probably proper atlases with attached maps, although some scholars believe that the references to maps in the text were later additions.No Greek manuscript of the Geography survives from earlier than the 13th century. However fragmentary papyri of later somewhat derivative works such as the Table of Noteworthy Cities have been found with the earliest, Rylands Library , dating to the early 3rd century. A letter written by the Byzantine monk Maximus Planudes records that he searched for one for Chora Monastery in the summer of 1295; one of the earliest surviving texts may have been one of those he then assembled. In Europe, maps were sometimes redrawn using the coordinates provided by the text, as Planudes was forced to do. Later scribes and publishers could then copy these new maps, as Athanasius did for the emperor Andronicus II Palaeologus. The three earliest surviving texts with maps are those from Constantinople based on Planudes's work.
File:Rylands Library Greek Papyrus 522.jpg|thumb|A 3rd century papyrus fragment of Ptolemy's Table of Noteworthy Cities
The first Latin translation of these texts was made in 1406 or 1407 by Jacobus Angelus in Florence, Italy, under the name Geographia Claudii Ptolemaei. It is not thought that his edition had maps, although Manuel Chrysoloras had given Palla Strozzi a Greek copy of Planudes's maps in Florence in 1397.
| Repository and Collection Number | Siglum | Date | Maps | Image |
| Vatican Library, | X | 12th-13th century | No extant maps | |
| Copenhagen University Library, Fragmentum Fabricianum Graecum 23 | F | 13th century | Fragmentary; originally world and 26 regional | |
| Vatican Library, Urbinas Graecus 82 | U | 13th century | World and 26 regional | |
| Istanbul Sultan's Library, Seragliensis 57 | K | 13th century | World and 26 regional | |
| Vatican Library, Vat. Gr. 177 | V | 13th century | No extant maps | |
| Laurentian Library, Plut. 28.49 | O | 14th century | Originally world, 1 Europe, 2 Asia, 1 Africa, 63 regional | |
| Bibliothèque nationale de France, Gr. Supp. 119 | C | 14th century | No extant maps | |
| Vatican Library, Vat. Gr. 178 | W | 14th century | No extant maps | |
| British Library, Burney Gr. 111 | T | 14th-15th century | Maps derived from Florence, Pluto 28.49 | |
| Bodleian Library, 3376 -Qu. Catal. i, Cod. Seld. 41 | N | 15th century | No extant maps | |
| Vatican Library, Pal. Gr. 388 | 15th century | World and 63 regional No extant maps | ||
| Laurentian Library, Pluto 28.9 | 15th century | No extant maps | ||
| Biblioteca Marciana, Gr. 516 | R | 15th century | Originally world and 26 regional | |
| Vatican Library, Pal. Gr. 314 | Z | 15th century | No extant maps; written by Michael Apostolios in Crete | |
| British Library, Harley MS 3686 | 15th century | |||
| Huntington Library, Wilton Codex | 15th century | One world, ten of Europe, four of Africa, and twelve of Asia, elegantly coloured and illuminated with burnished gold. |
Stemma
Berggren & Jones place these manuscripts into a stemma whereby U, K, F and N are connected with the activities of Maximos Planudes. From a sister manuscript to UKFN descends R, V, W & C, however the maps were either copied defectively or not at all. "Of the greatest importance for the text of the Geography" they state is manuscript X ; "because it is the only copy that is uninfluenced by the Byzantine revision." e.g. the 13th-14th century corrections of Planudes, possibly associated with recreating the maps.Regarding the maps, they conclude that it was unlikely that extant maps survived from which the above stemma descends, even if maps existed in antiquity:
"The transmission of Ptolemy's text certainly passed through a stage when the manuscripts were too small to contain the maps. Planudes and his assistants therefore probably had no pictorial models, and the success of their enterprise is proof that Ptolemy succeeded in his attempt to encode the map in words and numbers. The copies of the maps in later manuscripts and printed editions of the Geography were reproduced from Planudes' reconstructions."Mittenhuber further divides the stemma into two recensions of the original c.AD 150 lost work: Ξ and Ω. Recension Ω contains most of the extant manuscripts and is subdivided into a further two groups: Δ and Π. Group Δ contains parchment manuscripts from the end of the thirteenth century, which are the earliest extant manuscripts of the Geography; these are U, K & F. Recension, Ξ, is represented by one codex only, X. Mittenhuber agrees with Berggren & Jones, stating that "The so-called Codex X is of particular significance, because it contains many local names and coordinates that differ from the other manuscripts... which cannot be explained by mere errors in the tradition.".
Although no manuscripts survive from earlier than the late 13th century; there are references to the existence of ancient codicies in late antiquity. One such example is in an epistle by Cassiodorus :
“Tum, si vos notitiae nobilis cura inflammaverit, habetis Ptolemaei codicem, qui sic omnia loca evidenter expressit, ut eum cunctarum regionum paene incolam fuisse iudicetis. Eoque fit, ut uno loco positi, sicut monachos decet, animo percurratis, quod aliquorum peregrinatio plurimo labore collegit.”.The existence of ancient recensions that differ fundamentally to the surviving manuscript tradition can be seen in the epitomes of Markianos by Stephanus:
"Καὶ ἄλλοι οὕτως διὰ του π Πρετανίδες νῆσοι, ὡς Μαρκιανὸς καὶ Πτολεμαῖος."The tradition preserved within the stemma of surviving manuscripts by Stückelberger & Grasshoff only preserves "Β" and not "Π" recentions of "Βρεττανικήσ".
Contents
The Geography consists of three sections, divided among 8 books. Book I is a treatise on cartography and chorography, describing the methods used to assemble and arrange Ptolemy's data. From Book II through the beginning of Book VII, a gazetteer provides longitude and latitude values for the world known to the ancient Romans. The rest of Book VII provides details on three projections to be used for the construction of a map of the world, varying in complexity and fidelity. Book VIII constitutes an atlas of regional maps. The maps include a recapitulation of some of the values given earlier in the work, which were intended to be used as captions to clarify the map's contents and maintain their accuracy during copying. Book 8 formed the basis for the Table of Noteworthy Cities.Cartographical treatise
Maps based on scientific principles had been made in Europe since the time of Eratosthenes in the 3rd century BC. Ptolemy improved the treatment of map projections. He provided instructions on how to create his maps in the first section of the work.Gazetteer
The gazetteer section of Ptolemy's work provided latitude and longitude coordinates for all the places and geographical features in the work. Latitude was expressed in degrees of arc from the equator, the same system that is used now, though Ptolemy used fractions of a degree rather than minutes of arc. His Prime Meridian, of 0 longitude, ran through the Fortunate Isles, the westernmost land recorded, at around the position of El Hierro in the Canary Islands. The maps spanned 180 degrees of longitude from the Fortunate Isles in the Atlantic to China.Ptolemy was aware that Europe knew only about a quarter of the globe.