Studies and Knowledge Fusion in Archaeological Site Maps Managed in a 3d Gis

The protection and conservation attempts of ancient monumental heritage of the city of Hierapolis of Phrygia, during the last few years, are more delineated than in the past as inevitably connected to the environment context, which is characterized by the more extended and significant limestone concretions phenomenon in the world. Studies, excavation works, ancient monuments restorations, carried out through the cooperation between the archaeological Italian Mission (directed by Prof. F. D’Andria, University of Lecce) and the Turkish Cultural Ministry are more and more connected to the safeguard and valorisation of the environmental heritage. In such state, specific and variegate issues are requested to every group; so even the Polytechnic of Turin research unit, involved in the large scale map adjournment and the architectonical metric survey of several city structures, moved objectives and researches in new directions. The actual city map updating, realized mostly by topographical methods for ruins and architectural buildings and by contours extractions from a traditional cartography, needed an updated source of spatial data to obtain the enlargement of the original map to the surroundings areas of archaeological ruins. New fields of spatial data acquisition and data processing and managing have been adopted in order to use and adapt them to the new perspective of archaeological site conservation and management. As the realization of a new photogrammetric flight in the area of Hierapolis is not so simple to achieve for strangers, the best way to obtain a good product at low cost is the use of remote sensing techniques. The objective of the present work is to highlights the following topics: • Orthophoto production from remote sensing data in order to carry out geographical data. • Data integration to supporting thematic studies (streets organizations; digital elevation model and water sliding). 1. GEOMATIC TECHNIQUES TO SUPPORT ARCHAEOLOGICAL RESEARCH The protection program of the environmental and monumental site, started with the inclusion of Pamukkale/Hierapolis into the UNESCO humanity patrimony list, has strongly evolved in the direction of conservation and valorisation of the whole site with significant and tangible evidences. The more important recent interventions, realized by the Turkish administration, consist in the planning and realization of visit routes to facilitate and improve the interpretation of archaeological evidences related to the environment. Moreover several areas inside the city have been submitted to a strong requalification, gained by the destroying of the hotels which were cause of a serious environmental pollution and of a real threat to limestone conservation. The general updating of the city map has been focalized in archaeological urban zone (excavation areas) and in extra city walls areas, where the modern urbanization grown has never been surveyed and integrated in the ancient city plan. Good portions of land, inside and outside the ancient city territory, has been walked across by archaeologists to set up the so called archaeological survey, that is careful searching out and observation of human traces of settlement on terrain. The important integration with geomatic techniques and archaeological survey allow to obtain meaningful further issues about land description, and it enable to decrease the time for map updating (scale 1:1000), on the other hand very much time is require for excavation works and close range detailed survey (by topographical and photogrammetric methods) Figure 1. Sight of ruins and ancient limestone trenches. XXI International CIPA Symposium, 01-06 October, Athens, Greece