What is a Nautical Chart? Part II | The Treatises of Pedro Nunes about the nautical chart by Joaquim

The pre-Mercator nautical chart is an amazing artefact of unexpected complexity. Not because its construction relied on sophisticated methods but, on the contrary, owing to the limitations imposed by contemporary navigation, which prevented the adoption of the cartographic paradigms prescribed by Ptolemy on his Geography – that is – the use of latitudes and longitudes in chart making. Those limitations were the impossibility of determining longitude on board and the errors caused by the uncorrected magnetic declination on the directions measured with the marine compass and transferred to the charts. In this talk, the geometry of the medieval and early modern nautical chart is described. The

What is a Nautical Chart Really? The concepts of internal and external geometry applied to early mod

The pre-Mercator nautical chart is an amazing artefact of unexpected complexity. Not because its construction relied on sophisticated methods but, on the contrary, owing to the limitations imposed by contemporary navigation, which prevented the adoption of the cartographic paradigms prescribed by Ptolemy on his Geography – that is – the use of latitudes and longitudes in chart making. Those limitations were the impossibility of determining longitude on board and the errors caused by the uncorrected magnetic declination on the directions measured with the marine compass and transferred to the charts. In this talk the geometry of the medieval and early modern nautical chart is described. The c

Call for Papers International Workshop on the Origin and Evolution of the Nautical, 4-5 June 2020

The Interuniversity Centre for the History of Science and Technology (CIUHCT) invites paper proposals for the International Workshop on the Origin and Evolution of the Nautical Chart to be held on June 4-5, 2020, at the Instituto Hidrográfico, Lisbon, Portugal. ​ The event will be integrated within the activities of the European Research Council Project MEDEA-CHART, hosted by the Faculty of Sciences, University of Lisbon. Instructions for submission ​ All submissions are to be made via email to portmeeting@ciuhct.org by December 31st, 2019, with the subject heading 'Nautical Chart Meeting Lisbon 2020’. ​ Submissions should include an abstract (up to 400 words) and a short curriculum vitae (u

Call for a research fellowship is open

We are seeking for a highly motivated researcher with a master’s degree on any field to integrate the Medea-Chart team of researchers. The candidate should reside in Portugal for the whole duration of the fellowship and may already be enrolled in the PhD program of “History and Philosophy of Sciences” of the Faculty of Sciences - University of Lisbon (FCUL), at the time of the present call. Scientific Areas: History of Science and Technology, History of Cartography, History of Navigation. More information can be found here.