Ptolemy Error

Geōgraphikḕ Hyphḗgēsis, lit."Geographical Guidance"), also known by its Latin names as the Geographia and the Cosmographia, is a gazetteer, an atlas, and

Ptolemy Geography

a treatise on cartography, compiling the geographical knowledge of the 2nd-century ptolemy map Roman Empire. Originally written by Ptolemy in Greek at Alexandria around AD150, the work was a revision

Claudius Ptolemy

of a now-lost atlas by Marinus of Tyre using additional Roman and Persian gazetteers and new principles.[1] Its translation into Arabic in the 9th century and Latin in almagest 1406 was highly influential on the geographical knowledge and cartographic traditions of the medieval Caliphate and Renaissance Europe. Contents 1 Manuscripts 2 Contents 2.1 Cartographical treatise 2.2 Gazetteer 2.3 Atlas 3 History 3.1 Antiquity 3.2 Caliphate 3.3 Renaissance 3.4 Christopher Columbus 3.5 Early modern Ottoman Empire 4 Longitudes error and Earth size 5 Gallery 6 geographia See also 7 Notes 8 Citations 9 References 10 Further reading 11 External links 11.1 Primary sources 11.2 Secondary material Manuscripts[edit] The world map from Codex Vaticanus Urbinas Graecus 82, done according to Ptolemy's 1st projection The world map from Codex Seragliensis 57, done according to Ptolemy's 2nd projection Versions of Ptolemy's work in antiquity were probably proper atlases with attached maps, although some scholars aver that the references to maps in the text were later additions. No Greek manuscript of the Geography survives from earlier than the 13th century.[2] A letter written by the Byzantine monk Maximus Planudes records that he searched for one for Chora Monastery in the summer of 1295;[3] one of the earliest surviving texts may have been one of those he then assembled.[4] In Europe, maps were sometimes made redrawn using the coordinates provided by the text,[5] as Planudes was forced to do.[3] Later scribes and publishers could then copy these new maps, as Athanasius did for the emperor AndronicusII

byDmitry ShcheglovURLtandfonline.comViewsAbstract:It is well known that all longitudes in Ptolemy’s Geography are cumulatively overestimated, so that his map is excessively stretched out from west to east in comparison

Tetrabiblos

with the modern map. In recent years, a hypothesis have ptolemy theory been advanced that this stretching can be explained as a result of the change in

Al Idrisi

the value of the Earth’s circumference from a larger one proposed by Eratosthenes to a lesser one by Posidonius. This explanation has two necessary presuppositions: https://en.wikipedia.org/wiki/Geography_(Ptolemy) (1) that Ptolemy’s map is stretched out by a factor of ∼1·4 which coincides with the ratio between Eratosthenes’ and Posidonius’ values, and (2) that Ptolemy’s error in longitude grows almost linearly. This article argues that the situation is more complex and nuanced. In fact, the error in longitude on Ptolemy’s http://www.academia.edu/9632915/The_Error_in_Longitude_in_Ptolemys_Geography_Revisited map (and the stretching factor of the map, accordingly) varies considerably depending on longitude, latitude, and region. In particular, the error grows most slowly in the Eastern Mediterranean, which is probably due to the fact that this region was the centre of the ancient world. Therefore, Ptolemy’s error in longitude cannot be explained by one universal cause, but only by a combination of different factors. This article as well as any other publications may be easily downloaded through the Russian Pirate system http://sci-hub.ioDmitry Shcheglov hasn't uploaded this document.Let Dmitry know you want this document to be uploaded.The Error in Longitude in Ptolemy's Geography RevisitedAdded byDmitry Shcheglovwww.tandfonline.com/doi/abs/10.1179/1743277414Y.0000000098 ×CloseLog InLog InwithFacebookLog InwithGoogleorEmail:Password:Remember me on this computerorreset passwordEnter the email address you signed up with and we'll email you a reset link.Need an account?Click here to sign up Job BoardAboutPressBlogPeoplePapersTermsPrivacyCopyrightWe're Hiring!Help Center Find new research papers in:PhysicsChemistryBiologyHealth SciencesEcologyEarth SciencesCognitive ScienceMathematicsComputer Science Academia © 2016

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