The "Marmora Phrygiae" platform. Open data for knowledge of the southern Phrygian marble quarries and for the study of the ancient sites of Hierapolis|La piattaforma "marmora phrygiae". Open data per la conoscenza delle cave di marmo della Frigia meridionale e per lo studio dei cantieri antichi di Hierapolis

The Marmora Phrygiae project deals with some of the main issues related to the study of ancient quarries and building sites with a systematic approach, integrating the skills of experts from different disciplines: archaeology, ancient topography, art history, architecture, geology, geophysics, chemistry, geochemistry, biology, remote sensing, computer science, and Roman law. This paper summarizes the main scientific results of the project and the computer techniques used for implementing the Marmora Phrygiae online geodatabase, a system aimed at data presentation on the web, sharing knowledge through Open Data. The Marmora Phrygiae database dynamically stores the results of archaeological research and archaeometric analyses in order to publish them online at the end of the project: after a registration process, free access to available data will be allowed. The same database is also interfaced to Geoserver, a web-oriented cartographic engine, in which the coordinates of each feature (monuments, quarries, artefacts, stone samples), acquired by a high-precision topographic GPS, are stored. This solution allowed acquiring important new data on the marble extractive district of Hierapolis, the organization of the urban building sites during the Roman Imperial age and the Early-Byzantine period, and their dynamics of supplying stone materials within the overall ancient marble extractive district of south-western Turkey.