The Gralheira lode in the territorium metallorum Tresminas/Jales. A "treasure trove" of ancient mining technology

The little-known Roman gold mining site "Gralheira" is located near the well-explored mine of Tresminas. The 2.5 km long, almost dead straight archaeological monument from the first and second centuries AD is currently under threat from possible mining activities on the one hand and from modern waste disposal in the pits on the other. Since 2019, the Roman mining traces have been investigated by means of intensive field inspections, terrestrial 3d laser scanning and aerial photography. The following article will present first impressions and findings on this structure, as well as questions and preliminary interpretations

Terrestrisches Laserscanning auf der Osterinsel – Dokumentation der Moai und der archäologischen Grabungen

Alle wieder aufgerichteten monumentalen Ritualplattformen der Osterinsel (Ahu) und ihre Statuen (Moai) wurden in den Jahren 2007 bis 2009 im Rahmen der Expedition von den Mitarbeitern der HafenCity Universität Hamburg durch terrestrisches Laserscanning systematisch erfasst und dokumentiert. Langfristiges Ziel des Projektes ist die Dokumentation aller Kolossalfiguren, die in zunehmendem Maße durch Verwitterung oder durch tierische und menschliche Einwirkung beschädigt werden und somit gefährdet sind. Alle relevanten Daten werden dafür in einem Geoinformationssystem (GIS) zusammengefasst. Zusätzlich werden mögliche Veränderungen ausgewählter Figuren durch Verwitterung analysiert, wobei in ersten Untersuchungen keine signifikanten Änderungen für den kurzen Zeitabstand von drei Jahren ermittelt werden konnten. Die Aufnahmen der Statuen und der archäologischen Grabungs- und Fundplätze durch terrestrisches Laserscanning sowie die 3D-Modellierung der hoch aufl ösenden Punktwolken durch Dreiecksvermaschung zur Dokumentation der Objekte werden in diesem Beitrag beschrieben. Der Artikel wird zeitnah als PDF verfügbar sein

Terrestrial laserscanning system Mensi GS100 : accuracy tests, experiences and projects at the Hamburg University of Applied Sciences

3D terrestrial laser scanning is well on the way to proving itself to be a 3D measurement technique that can complement or replace the established techniques of photogrammetry and tacheometry. For this reason investigations into accuracies and behavior are very important for the understanding and improvement of such measuring systems. The Department of Geomatics at Hamburg University of Applied Sciences has investigated the terrestrial 3D laser scanning system Mensi GS100/GS200 regarding the accuracy of distances measured and practical handling of the equipment in projects. It can be stated that distances measured with the laser scanner Mensi GS100 are systematically too long when compared to reference distances and that distances measured to spheres and targets placed on identical points are systematically different. In registration and geo-referencing of point clouds using Mensispheres and targets in a 3D test field standard deviations of approx. 3mm could be achieved when compared to reference points. Investigations into the planarity of a stone slab showed measurement noise of some millimeters in the point cloud; which is within the range of the measuring accuracy. The laser scanners Mensi GS100 and GS200 have already been used in several projects at the HAW Hamburg and also in co-operation with a private engineering office. First experiences in data acquisition, registration and georeferencing will be reported in this paper using both systems.PeerReviewe

CSB: a Python framework for structural bioinformatics

{Summary: Computational Structural Biology Toolbox (CSB) is a cross-platform Python class library for reading, storing and analyzing biomolecular structures with rich support for statistical analyses. CSB is designed for reusability and extensibility and comes with a clean, well-documented API following good object-oriented engineering practice. Availability: Stable release packages are available for download from the Python Package Index (PyPI), as well as from the project’s web site http://csb.codeplex.com.

Gaoping, China. Die Konstruktion der Mittleren Buddha-Halle des Chongming-Klosters im Kreis Gaoping, Provinz Shanxi. Die Arbeiten der Jahre 2018 bis 2020

The Middle Buddha Hall of Chongming Monastery in Gaoping County, Shanxi Province is an existing wooden construction from the early period of the Northern Song Dynasty, and predates the treatise on architecture Yingzao Fashi. Its unusual main components of the dougong and the roof construction are a continuation of the style from the Tang Dynasty, which provides valuable examples for the study of the development of wooden structure in China. In the summer of 2018, a German-Chinese survey and research team measured the dougong in the northeast of the Middle Buddha Hall in detail by using 3D scanning and the technique of Structure from Motion. The surveying work and the documentation helped to further study the dougong and the roof construction of the Hall