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Mapping of Adriatic Sea on Portolan Charts: A Cartometric Analysis (CROSBI ID 677480)

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Marelić, Tome Mapping of Adriatic Sea on Portolan Charts: A Cartometric Analysis // 14th International Conference on Geoinformation and Cartography Zagreb, Hrvatska, 27.09.2018-29.09.2018

Podaci o odgovornosti

Marelić, Tome

engleski

Mapping of Adriatic Sea on Portolan Charts: A Cartometric Analysis

Portolan charts are early form of nautical charts, produced during late medieval and early modern period by several cultural circles inhabiting coastal regions of Mediterranean. Accuracy of spatial representation on portolan charts incomparably surpasses their chronological map predecessors, known as mappemundi. Most of those charts represent cartographic depiction of Mediterranean basin with its integral and surrounding seas, including the Adriatic Sea. Eleven portolan charts, created during a time period of about 300 years (from late 13th to late 16th century), and on which Adriatic Sea is being depicted, have been used as an object of study. A total of 21 identical points and 43 lines among them, that, as a unit, make a triangulated irregular network stretched across open sea of Adriatic, have been identified on all 11 charts and georeferenced on three modern cartographic projections over equivalent identical control points. This was conducted in order to examine the overall best fit compared to those projections – chronologically ; for each map (containing all the points) individually, and spatially ; for every chosen point (across all examined maps) individually. For each of those two aspects, map accuracy has been examined in terms of determining lowest RMSE and average values across three chosen modern projections. Also, deviations from average values, i.e. variations in mapping precision among charts, and also, among chosen points, were examined. This thorough examination of their accuracy and precision has yielded large amounts of quantitative data, which will be presented visually using maps and diagrams. Research results presented here are the preliminary section of author’s broader ongoing doctoral thesis research, entitled: Accuracy of Depiction of Adriatic Sea on Portolan Charts.

portolan charts, Adriatic Sea, accuracy, cartometric analysis

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Podaci o prilogu

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Podaci o skupu

14th International Conference on Geoinformation and Cartography

predavanje

27.09.2018-29.09.2018

Zagreb, Hrvatska

Povezanost rada

Geodezija, Geografija