Map Projections

Map Projections in the History of Cartography

5507.1 - Ptolemy's Britain and Ireland: A New Digital Reconstruction

Wednesday, July 5
1:30 PM - 1:50 PM
Location: Maryland B

In this paper, we expand application of our mathematical methods for translating ancient coordinates from the classical Geography by Claudius Ptolemy into modern coordinates from India and Arabia to Britain and Ire-land, historically important islands on the periphery of the ancient Roman Empire. The methods include trian-gulation and flocking with subsequent Bayesian correction. The results of our work can be conveniently visu-alized in modern GIS tools, such as ArcGIS, QGIS, and Google Earth. The enhancements we have made in-clude a novel technique for handling tentatively identified points. We compare the precision of reconstruction achieved for Ptolemy's Britain and Ireland with the precisions that we had computed earlier for his India be-fore the Ganges and three provinces of Arabia. We also provide improved validation and comparison amongst the methods applied. We compare our results with the prior work, while utilizing knowledge from such im-portant ancient sources as the Antonine Itinerary, Tabula Peutingeriana, and the Ravenna Cosmography. The new digital reconstruction of Claudius Ptolemy's Britain and Ireland presented in this paper, along with the accompanying linguistic analysis of ancient toponyms, contributes to improvement of understanding of our cultural cartographic heritage by making it easier to study the ancient world using the popular and accessible GIS programs.

Dmitri A. Gusev

Associate Professor
Purdue University

Dmitri A. Gusev received his Ph.D. in Computer Science from Indiana University in 1999. In 1999-2007, Dmitri worked for Eastman Kodak as an Image Processing Scientist. He developed algorithms for digital halftoning, color management, image quality evaluation, and image compression for digital color presses. Since 2013, he is an Associate Professor of Computer and Information Technology at Purdue University. His research interests include imaging, game development, virtual reality, and GIS visualization of historical data.


Send Email for Dmitri Gusev

Corey Abshire

Graduate Student, Data Science
Indiana University

David “Corey” Abshire earned his Bachelor of Science with Distinction in Computer and Information Technology from Purdue University in 2014. He is currently an MS graduate student in the Data Science program at the School of Informatics and Computing, Indiana University, Bloomington. His research has focused on big data, visualization, color science, game development, and digital archaeology. ‎Since 2014, Corey has worked as Principal Systems Reliability Engineer at Cummins Inc.


Send Email for Corey Abshire

Anthony Durham

Computer Consultant and Technical Writer

Dr. Anthony Durham spent 15 years as a research scientist, working on the physical chemistry of plant virus proteins and then on ion flows, especially calcium, across membranes. He then spent another 25 years running a computer software business, with a particular focus on the use of vector outlines in the sign industry. Dr. Durham currently studies the geography of Roman Britain and the ancient place names.


Send Email for Anthony Durham

Sergey K. Stafeyev


Sergey K. Stafeyev graduated from Moscow Geological Prospecting Institute in 1984, specializing in geological prospecting of rare radioactive elements. He works for VNIIGeoSystem (Vserossiyskiy nauchno-issledovatel'skiy institut geologicheskikh, geofizicheskikh i geokhimicheskikh sistem) in Moscow, Russian Federation, as an engineer.


Send Email for Sergey Stafeyev

Fritz Kessler

Senior Research Associate
The Pennsylvania State University

Fritz Kessler, a Senior Research Associate and Associate Professor in the Geography Department at Pennsylvania State University, teaches online and residential courses in cartography, map projections, spatial statistics, and GIS. Research interests include map projections and cartographic history. Publications include: Thematic Cartography and GeoVisualization and articles in Annals of the Association of American Geographers, Cartographica, Cartography and Geographic Information Science, and Journal of Geography. Professional cartographic experience includes positions with the USGS, Intergraph, R.R. Donnelley and Sons, and the T.R. Smith Map Library. He actively serves the North American Cartographic and Information Society and the Cartography and Geographic Information Society.


Send Email for Fritz Kessler


5507.1 - Ptolemy's Britain and Ireland: A New Digital Reconstruction


Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Ptolemy's Britain and Ireland: A New Digital Reconstruction