| Entry: | Since Monday July 22 I have been working on a full review of all the 3D models that have been generated in Building 89 using the technique of image-based modeling. This process is due to a technological advancement in Agisoft Photoscan, the software we have employed to digitally document our excavation since 2011. A higher accuracy and the possibility to geo-reference the 3D models of each stratigraphic unit using control points from total station pushed capability of recording and representing the archaeology in B89 to the edge. A calculated mean error in the registration and georeferencing of the model is estimated in 0.008 m. This incredible level of precision allowed us to employ the 3D models for the creation of orthophotos of wall, plans, and sections to be used for 2D drawing on our tablet PC and for estimating the accuracy of our work in the site GIS. The most impressive result of my recent work is the possibility to assess in the same visualization environment all of the phases of the exaction since July 2011. About 60 3D models-generated in the last 3 years- represent all the unit, feature, and relevant aspect of building 89 giving us a new perspective on the archaeology and stratigraphy of the building. How does this incredible amount of information affect our interpretative analysis? How can archaeologist benefit from the possibility of visualizing the layers of B89 without colors, increasing contrast, changing the lighting, or analyzing the platform features (F3474, F3475, and F3477) we have excavated in the last days using x-ray or microscope-like techniques or observing them from a point of view that is not possible in reality (e.g. 10 meters above up in the air)? |
