Ptolemy’s map-making method: An analysis of the locating system used in Geographia for the inland cities in the Iberian Peninsula
DOI:
https://doi.org/10.36707/palaeohispanica.v0i14.52Keywords:
Ptolemy’s Geographia, Antonine Itinerary, Hispania, Map-making method, Iter ab Asturica per Cantabriam CaesaraugustamAbstract
This study analyzes the map-making method developed by Ptolemy in the elaboration of his Geographia. The aim of this analysis is to reveal and define the locating system used by the author in order to place the inland towns of the Iberian Peninsula. After a critical examination of the dif-ferent possible systems, the study shows their potential use for the location of the cities in the Iter ab Asturica per Cantabriam Caesaraugustam (known as the 27th itinerary) by comparing the distances deduced from the Ptolemaic coordinates with those transmited by the Antonine Itinerary. The results prove that Ptolemy used a two-phase locating process: first, he calculated arithmetically the positions of towns with astronomical data; next, according to them and by means of a graphical system he located the cities that only had geometric data.
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Names and email addresses submitted to this journal will only be used for tasks related to the journal and will not be shared with any third party or used for any other purpose.
In accordance with the Regulation UE 2016/679, information gathered by the Institución Fernando el Católico de la Excma. Diputación de Zaragoza (IFC) will be used for carrying out the functions of an academic publication, the handling of claims, appeals, complaints, suggestions, surveys as well as any other activity involved in the management of the journal.
Cubic Factory is in charge of handling said data. They can be contacted at cubic@cubicfactory.com.
Data can be given to public agencies with the relevant competencies and in case of legal obligations.
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