The Ptolemy world map is a map of the

world In its most general sense, the term "world" refers to the totality of entities, to the whole of reality or to everything that is. The nature of the world has been conceptualized differently in different fields. Some conceptions see the worl ...

known to Greco-Roman societies in the 2nd century. It is based on the description contained in

Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...

's book ''

Geography Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and ...

'', written . Based on an inscription in several of the earliest surviving manuscripts, it is traditionally credited to

Agathodaemon of Alexandria Agathodaemon of Alexandria ( grc-gre, Ἀγαθοδαίμων Ἀλεξανδρεὺς, ''Agathodaímōn Alexandreùs'') was a Greek or Hellenized cartographer, presumably from Alexandria, Egypt, in late Antiquity, probably in the 2nd century A.D. ...

. Notable features of Ptolemy's map is the first use of longitudinal and latitudinal lines as well as specifying terrestrial locations by celestial observations. The ''Geography'' was translated from

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

into

Arabic Arabic (, ' ; , ' or ) is a Semitic languages, Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C ...

in the 9th century and played a role in the work of

al-Khwārizmī Muḥammad ibn Mūsā al-Khwārizmī ( ar, محمد بن موسى الخوارزمي, Muḥammad ibn Musā al-Khwārazmi; ), or al-Khwarizmi, was a Persian polymath from Khwarazm, who produced vastly influential works in mathematics, astronomy ...

before lapsing into obscurity. The idea of a global coordinate system revolutionized European geographical thought, however, and inspired more mathematical treatment of cartography. Ptolemy's work probably originally came with maps, but none have been discovered. Instead, the present form of the map was reconstructed from Ptolemy's coordinates by

Byzantine The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...

monks A monk (, from el, μοναχός, ''monachos'', "single, solitary" via Latin ) is a person who practices religious asceticism by monastic living, either alone or with any number of other monks. A monk may be a person who decides to dedicat ...

under the direction of

Maximus Planudes Maximus Planudes ( grc-gre, Μάξιμος Πλανούδης, ''Máximos Planoúdēs''; ) was a Byzantine Greek monk, scholar, anthologist, translator, mathematician, grammarian and theologian at Constantinople. Through his translations from La ...

shortly after 1295. It probably was not that of the original text, as it uses the ''less'' favored of the two alternate projections offered by Ptolemy.

Continents

The continents are given as

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

, and

Libya Libya (; ar, ليبيا, Lībiyā), officially the State of Libya ( ar, دولة ليبيا, Dawlat Lībiyā), is a country in the Maghreb region in North Africa. It is bordered by the Mediterranean Sea to the north, Egypt to Egypt–Libya bo ...

(

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

). The

World Ocean The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the worl ...

is only seen to the west. The map distinguishes two large enclosed seas: the

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...

and the

Indian Indian or Indians may refer to: Peoples South Asia * Indian people, people of Indian nationality, or people who have an Indian ancestor ** Non-resident Indian, a citizen of India who has temporarily emigrated to another country * South Asia ...

(''Indicum Pelagus''). Due to Marinus and Ptolemy's mistaken measure of the circumference of the earth, the former is made to extend much too far in terms of degrees of arc; due to their reliance on

Hipparchus Hipparchus (; el, Ἵππαρχος, ''Hipparkhos''; BC) was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry, but is most famous for his incidental discovery of the precession of the equi ...

, they mistakenly enclose the latter with an eastern and southern shore of unknown lands, which prevents the map from identifying the western coast of the World Ocean.

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

is bound by the

Indus The Indus ( ) is a transboundary river of Asia and a trans-Himalayan river of South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in Western Tibet, flows northwest through the disputed region of Kashmir, ...

and

Ganges The Ganges ( ) (in India: Ganga ( ); in Bangladesh: Padma ( )). "The Ganges Basin, known in India as the Ganga and in Bangladesh as the Padma, is an international river to which India, Bangladesh, Nepal and China are the riparian states." is ...

rivers, but its peninsula is much shortened. Instead,

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

('' Taprobane'') is greatly enlarged. The

Malay Peninsula The Malay Peninsula (Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area ...

is given as the Golden Chersonese instead of the earlier "Golden Island", which derived from Indian accounts of the mines on

Sumatra Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...

. Beyond the Golden Chersonese, the

Great Gulf The Great Gulf is a glacial cirque, or amphitheater-like valley head formed from a glacier by erosion, located in the White Mountains of New Hampshire. The cirque's walls are formed, from south to north, by the mountainsides of Mount Washington ( ...

(''Magnus Sinus'') forms a combination of the

Gulf of Thailand The Gulf of Thailand, also known as the Gulf of Siam, is a shallow inlet in the southwestern South China Sea, bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula. It is around in l ...

and

South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...

which is bound by the unknown lands thought to enclose the Indian Sea.

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

is divided into two realms—the

Qin Qin may refer to: Dynasties and states * Qin (state) (秦), a major state during the Zhou Dynasty of ancient China * Qin dynasty (秦), founded by the Qin state in 221 BC and ended in 206 BC * Daqin (大秦), ancient Chinese name for the Roman Emp ...

(''Sinae'') and the Land of Silk (''Serica'')—owing to the different accounts received from the overland and maritime

Silk Road The Silk Road () was a network of Eurasian trade routes active from the second century BCE until the mid-15th century. Spanning over 6,400 kilometers (4,000 miles), it played a central role in facilitating economic, cultural, political, and reli ...

s. The ''Geography'' and the map derived from it probably played an important role in the expansion of the

Roman Empire The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Republican period of ancient Rome. As a polity, it included large territorial holdings around the Mediterr ...

to the East. Trade throughout the

Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by th ...

was extensive from the 2nd century, and many Roman trading ports have been identified in

. From these ports,

Roman embassies to China Sino-Roman relations comprised the (mostly indirect) contacts and flows of trade goods, of information, and of occasional travellers between the Roman Empire and the Han Empire of China, as well as between the later Eastern Roman Empire and va ...

are recorded in Chinese historical sources from around 166. The Danish historian

Gudmund Schütte Gudmund Schütte (17 January 1872– 12 July 1958) was a Danish philologist, historian and writer who specialized in Germanic studies. Biography Gudmund Schütte was born at Eskjær, Salling, Denmark on 17 January 1872, the son of landowner The ...

attempted to reconstruct the Danish part of Ptolemy's world map. It includes several place- and

tribe The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide usage of the term in English language, English is in the discipline of anthropology. This definition is contested, in p ...

-names, some of which Schütte assigned a contemporary equivalent. The most prominent feature of the map is the

peninsula A peninsula (; ) is a landform that extends from a mainland and is surrounded by water on most, but not all of its borders. A peninsula is also sometimes defined as a piece of land bordered by water on three of its sides. Peninsulas exist on all ...

Jutland Jutland ( da, Jylland ; german: Jütland ; ang, Ēota land ), known anciently as the Cimbric or Cimbrian Peninsula ( la, Cimbricus Chersonesus; da, den Kimbriske Halvø, links=no or ; german: Kimbrische Halbinsel, links=no), is a peninsula of ...

placed north of the river ''

Albis The Albis is a chain of hills in the Canton of Zürich, Switzerland, stretching for some 19 km from Sihlbrugg in the south to Waldegg near Zürich in the north. The chain forms, among others, the border between the Affoltern and Horgen di ...

Trêva'', west of the ''Saxonôn'' Nesôi (

archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or sometimes a sea containing a small number of scattered islands. Examples of archipelagos include: the Indonesian Archi ...

), east of the ''Skandiai'' Nêsoi, which itself lies west of a larger island ''Skandia''. ''Skandia'' is home to the '' Goutai'' in the center, and the '' Phiraisoi'' in the east. North of Jutland lies a third archipelago ''Alokiai'' Nêsoi. South of the ''Albis'' live the '' Lakkobardoi'' and to its north the ''

Saxones The Saxons ( la, Saxones, german: Sachsen, ang, Seaxan, osx, Sahson, nds, Sassen, nl, Saksen) were a group of Germanic * * * * peoples whose name was given in the early Middle Ages to a large country ( Old Saxony, la, Saxonia) near the No ...

''. The west coast of Jutland is home to the ''Sigulônes'', the ''Sabaliggio'', the '' Kobandoi'', the ''Eundusioi'' and the northernmost ''Kimbroi'' (possibly

Cimbri The Cimbri (Greek Κίμβροι, ''Kímbroi''; Latin ''Cimbri'') were an ancient tribe in Europe. Ancient authors described them variously as a Celtic people (or Gaulish), Germanic people, or even Cimmerian. Several ancient sources indicate that ...

). North and east is home to the ''Kimbrikê'' (possibly

), the ''Chersonêsos'' and the ''

Charudes The Charudes or Harudes were a Germanic group first mentioned by Julius Caesar as one of the tribes who had followed Ariovistus across the Rhine. While Tacitus' ''Germania'' makes no mention of them, Ptolemy's ''Geographia'' locates the Charu ...

''.

References

External links

Ptolemaic images
at the European Library

the first to use Ptolemy's 2nd projection, at the University of Minnesota

at Columbia University
Richard Donohue's presentation of Ptolemy's projection with modern geographic knowledge

GIS Analysis and Digital Reconstruction of Ptolemy's India beyond the Ganges, Serike and Sinae

Iterative Reconstruction of Ptolemy’s West Africa Using Modern GIS Analysis

Visualization and GIS Analysis of Ptolemy’s One-Sided Globe in the Old and Modern Contexts
{{cartography topics

World map A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of map projection, projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensiona ...

Historic maps of the world Foreign relations of ancient Rome 2nd-century works