Abstract
Abstract. Many important Cultural Heritage sites have been studied over long periods of time by different means of technical equipment, methods and intentions by different researchers. This has led to huge amounts of heterogeneous "traditional" datasets and formats. The rising popularity of 3D models in the field of Cultural Heritage in recent years has brought additional data formats and makes it even more necessary to find solutions to manage, publish and study these data in an integrated way. The MayaArch3D project aims to realize such an integrative approach by establishing a web-based research platform bringing spatial and non-spatial databases together and providing visualization and analysis tools. Especially the 3D components of the platform use hierarchical segmentation concepts to structure the data and to perform queries on semantic entities. This paper presents a database schema to organize not only segmented models but also different Levels-of-Details and other representations of the same entity. It is further implemented in a spatial database which allows the storing of georeferenced 3D data. This enables organization and queries by semantic, geometric and spatial properties. As service for the delivery of the segmented models a standardization candidate of the OpenGeospatialConsortium (OGC), the Web3DService (W3DS) has been extended to cope with the new database schema and deliver a web friendly format for WebGL rendering. Finally a generic user interface is presented which uses the segments as navigation metaphor to browse and query the semantic segmentation levels and retrieve information from an external database of the German Archaeological Institute (DAI).
Highlights
In the realm of Cultural Heritage documentation, visualization and analysis important sites and monuments are studied over time by different means of technical equipment, methods and intentions by different researchers
A segmentation of the 3D models, no matter being reality-based or reconstructed, into semantic entities and subentities according to different aims is an important step in preparing and organizing the data to connect geometry with semantic information using virtual reality as an intuitive communication vehicle
It outlines the thematic and technological frames in which this approach is successfully applied. It describes in detail the conceptual considerations and technical challenges that led to the presented solutions of storage, transmission, interaction and query of the specific data structures of semantically segmented models in the field cultural heritage
Summary
In the realm of Cultural Heritage documentation, visualization and analysis important sites and monuments are studied over time by different means of technical equipment, methods and intentions by different researchers This generally results in heterogeneous datasets spread around different research institutions, stored and archived in different media types and formats with heterogeneous data models and quality. These general characteristics apply for the UNESCO World Heritage Site of Copán (Honduras), which already has been studied for over 100 years. It is an important historical place where rich written sources have been found along with impressive temple structures and stone carvings. The paper ends with a short conclusion and outlook of the upcoming fields of research
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