Digital recording of stratigraphic excavations


The single deposits with their related surfaces are 3D volumes that are destroyed and recorded in the reverse order of their formation during the stratigraphic excavation process. To be able to fully reconstruct the part of the site destroyed by excavating, the surfaces of the excavated deposits have to be fully documented in 3D (``single surface planning''). Every single surface is photographed using a digital camera and rectified on site. The boundary polygon, the topography and the location of finds are recorded using total stations. First tests were carried out applying terrestrial 3D laser scanners. All data is imported into a ArcView GIS, where the georeferenced data is immediately available for further on-site analysis. The importation of data concerning terrain modelling and contouring of the surfaces is automated by the developed extension ArcDig 1.1. Further modules of the extension allow to calculate cross sections along arbitrary defined lines and to calculate the volume of any deposit. All additional attributable data like descriptions of surfaces and deposits, the find database etc. are integrated in the GIS for further analysis of the data. The creation of the stratigraphic matrix is done using ArchEd so far without interfacing to the GIS.

Proceedings of the 19th International Symposium CIPA 2003 textquotedblNew Perspectives to Save Cultural Heritagetextquotedbl