Institut für Raumbezogene Informations- und Messtechnik
Hochschule Mainz - University of Applied Sciences

Nachrichten

Wie verändern sich die Geistes- und Kulturwissenschaften im Zuge der fortschreitenden Digitalisierung? Diesem Thema widmeten sich am 29. Januar…

Die langjährige Kooperation zwischen dem i3mainz und dem RGZM wird im Kompetenzzentrum „Raumbezogene Informationstechnik in den Geisteswissenschaften“…

Projekte

Der Königspalast stellte über mehrere Jahrhunderte das offensichtlichste Symbol für Macht und Reichtum der Herrscher von Qatna dar. Offenbar scheuten seine Erbauer keine Kosten und…
Modellierung der historischen Geographie Nordmesopotamiens im 2. Jt. v. Chr. mittels der integrierten Analyse von Texten, Archäologie und Raum, Geoinformatik und dem semantischen N…

Publikationen

SIVT – Processing, viewing and analysis of 3D scans of the porthole slab and slab b2 of Züschen I

2015

S. Wefers,
T. Reich,
B. Tietz,
F. BOOCHS

BibTex

CAA

Semantic based Structuring of 3D technologies for their optimized use in cultural heritage documentation.

2015

A. Karmacharya,
S. Wefers,
F. Boochs

BibTex

43rd Conference of Computer Applications and Quantitative Methods in Archaeology, CAA 2015, Siena, Book of Abstracts.

Constant technological progress results in new possibilities to produce reliable and rich spatial data of cultural heritage objects: for instance, museums have started to digitize their collections, more and more archaeological excavations or features and entire CH buildings have been documented in 3D. It is now necessary to establish connections among different CH disciplines and several technical disciplines, and to work on collaborative projects.

Technicians and CH experts together evaluate the best technique for specific CH object documentation, implementation and use. This discussion arises from the knowledge gaps of each counterpart in respect to the other discipline. Projects such as Agora 3D (see below) clearly demonstrate the need for an evaluation of the different available techniques.

In order to make optimal use of these technological capabilities, it is important to identify and name the information required to best serve the reasoning processes in these application fields. Correspondingly it is necessary to know about the characteristics of digitization techniques producing the content adapted to the needs of the applications. Due to the considerable complexity of instruments and processes producing the data, it is helpful to have a clear structure which relates the capabilities of the instruments to the requirements of the applications.

The COST Action TD1201 “Colour and Space in Cultural Heritage (COSCH)” takes this need into account, aiming to enhance the understanding among these disciplines. We will focus on the already listed, structured and evaluated available 3D technologies. At the same time, experts in spectral and CH research started to list, structure, and evaluate their knowledge. These evaluations yield a structure of technologies, and ultimately the techniques and instruments using their characteristics. The understanding of these characteristics provides insights for their potential applications. The ontology knowledge model accessible through so-called “COSCHKR App” provides a knowledge structure. It benefits from the development of semantic technologies from the Semantic Web framework. Semantics, which provide meanings, are captured through the conceptual structure and are defined through the ontology. The overall aim of this ontology is the development of a software tool to enable a better understanding of data acquisition techniques and their support to optimally realize cultural heritage applications.


Support of Petroglyph analysis through processing and viewing of 3D scans.

2015

T. Reich,
F. Boochs,
S. Wefers,
B. Tietz

BibTex

43rd Conference of Computer Applications and Quantitative Methods in Archaeology, CAA 2015, Siena, Book of Abstracts.

Traditionally stone inscriptions or drawings are documented through pictures or rubbings. The latter ones represent an analogue copy of the stone’s surface and its features which are reproduced on paper. The disadvantage of this technique is the physical impact to the stone and the contained elements. Images reproduce the surface without contact. However, they might be affected by geometrical distortions and need appropriate lighting conditions to show the signs properly.

These problems will be avoided by means of non-contact 3D measuring techniques, like fringe projection. Such high resolution 3D techniques provide an exact geometrical copy of the original petroglyph, offering better results in legibility compared to traditional techniques. Moreover, it gives a more objective base for analysis and has less impact on the sometimes sensitive and eroded surfaces. Furthermore 3D data allows more extensive and further possibilities in processing and gives better preconditions for the interpretation.

However, depending on factors like resolution, scanned surface and degree of overlap between individual scans original 3D datasets may represent large up to really massive volumes of data. An effective use of such datasets can only be realised if they are condensed and prepared in a suitable way. This means reduction of the data volume, minimising any disturbing influence emerging from the spatial shape of the surface and emphasizing relevant information. The corresponding preparation of the data will then be a good base for a interpretation performed by the human science specialist through an adapted visualization. In addition the data should be prepared for high performance presentation to a wider community via the internet.

Processed digital copies of the Petroglyphs are visualised in order to enable the user to inspect the processed scans of the objects. By inspecting the scans the application provides a mass of functionality for achieving different views into the Petroglyphs and their appearance. This comprises on the one hand a simple 2D viewer for the processed data, and on the other hand a 3D viewer with interactive changeable light positions and water levels as well as a viewer for applying various lookup tables (colour), predefined image filters (convolution) and template matching (matching) regarding individual characters.

Provided functionality of the 3D viewer is based on features of 3D computer graphics. Surface normal vectors from the grey values of the processed scans and a light direction vector from an interactively changeable light source are computed. In addition shading is complemented by water filling, whereby the gray values are limited by the water level selected. Individual modifications are possible to improve the subjective impression by the user, trying to support him in his process of interpretation. Interactive changes of the light source directly affect the shading of the surface and provide a better idea of the 3D surface of the inscription board. Dynamic virtual water filling enables the user to obtain an even better impression of the depth of the individual characters and emphasise weathered characters.

The paper will explain the developed techniques and document its potential at selected data sets.


Integrating Complex Archaeological Datasets from the Neolithic in a Web-Based GIS

2015

T. Kohr,
T. Engel,
K.C. Bruhn,
D. Gronenborn

BibTex

42nd Annual Conference on Computer Applications and Quantitative Methods in Archaeology, CAA 2014

This paper presents DASIS (Distributed Archaeological Sites Information System) that serves as a virtual research environment for settlement structure analyses. In the past decade heterogeneous datasets of the West-Central European Neolithic have been generated in the context of several research projects. A key challenge is the integration of these complex project-specific data models with one-dimensional data tables of a Web GIS.
It will suggest potential ways to join archaeological data and to combine relational data structures providing spatial access on the data to enable further analysis. This scenario entails multiple problems that are prototypical and still lack a general solution. It proposes a modular data concept that is transferable to similar projects. At the same time it reviews and evaluates qualified frameworks that allow for implementing an individually tailored data model into an archaeological information system with GIS capabilities.ment of different methods for sustaining contributor participation through time and a discussion of their implications for the sustainability of the MicroPasts project and (potentially) other archaeological crowd-sourcing endeavours.


Modulare Digitalkameratachymeter

2015

M. SchlĂĽter,
S. Hauth

BibTex

n.A.

Das Vorhaben will einen Innovationsschub fĂĽr die Anwendung vermessungstechnischer
Tachymeter (auch Totalstationen, mobile Polarmesssysteme groĂźer Reichweite)
auslösen.
Ermöglicht wird dieser Innovationsschub durch die Integration bildgebender Sensoren
mit einem konsequent modularen Lösungsansatz an Stelle der bislang mit nur
mäßigem Erfolg unternommenen monolithischen Lösungsansätze. Durch unser Konzept
werden die stark unterschiedlichen Entwicklungszyklen der zentralen Systemkomponenten
entkoppelt. Dadurch werden mittelfristig insbesondere KMU, Entwicklungseinrichtungen
und Hochschulen in die Lage versetzt, anwendungsspezifische
Lösungen für den expandierenden Markt von Geoinformationen und den steigenden
Bedarf an räumlichen Geometriedaten zu entwickeln und in der Folge auch eigenständig
zu vermarkten.


Netzmessungen mit dem Leica Absolute Tracker AT402 zur Bestimmung geodätischer Prüfstrecken

2015

P. Arent,
R. Bretscher,
M. SchlĂĽter

BibTex

Allgemeine Vermessungs-Nachrichten (avn)

Zur Bestimmung geodätischer Prüfstrecken unter Nutzung eines Leica Absolute Trackers AT402 stellen wir Konzept und Ergebnisse vor. Dazu greifen wir die positiven Erfahrungen mit Lasertrackern beim Ringversuch auf der neuen Kalibrierbasis der Universität der Bundeswehr München zwischen 2009 und 2011 auf.
Im Unterschied zum Ringversuch konzentrieren wir uns auf die Bestimmung neuer und bestehender PrĂĽfstrecken im derzeit ĂĽblichen Pfeilerdesign mit einer Pfeilerkopf-Abschlussplatte mit 5/8-Zoll-Gewindezapfen zur DreifuĂźaufnahme. DafĂĽr schlagen wir eine Netzmessung unter Verwendung einfacher Pfeiler-Aufsatzadapter vor. AbschlieĂźend vergleichen wir unsere Ergebnisse, die bei unterschiedlichen meteorologischen
Bedingungen auf der Eichstrecke Weinolsheim des Landes Rheinland-Pfalz gewonnen wurden.


Grabungen 2014 innerhalb der Befestigung auf dem Kapellenberg bei Hofheim am Taunus

2015

T. Lang,
A. Cramer,
D. Gronenborn,
U. Recker,
S. Fiedler,
H. Thiemeyer

BibTex

hessenARCHĂ„OLOGIE

Waffen - Gewalt - Krieg. Beiträge zur Internationalen Tagung der AG Eisenzeit und des Instytut Archeologii Uniwersytetu Rzeszowskiego - Rzeszów 19.-22. September 2012.

2015

S. Wefers,
M. Karwowski,
J. Fries-Knoblach,
P. Trebsche,
P.C. Ramsl

BibTex

Beiträge zur Ur- und Frühgeschichte Mitteleuropas

Studentische Projekte

Studierende des Masterstudiengangs Geoinformatik und Vermessung

LINK

Im Rahmen des Mastermoduls "Interdisziplinäre Anwendungen raumbezogener Informationstechnik" in den Studiengängen "Geoinformatik und Vermessung" (HS Mainz) und "Archäologie" (JGU Mainz) findet am 4. Dezember 2014 ein Workshop statt. Das mit dem "Open Humanities Award" der EU-Initiative DM2E (Digitised Manuscripts to Europeana) ausgezei…


Nina Schäfer,
Jan Mahle,
Christian Wiemers,
Martin Saufaus

LINK

Im Rahmen des Projekts wird ein Konzept für die Indoor-Navigation mit der iBeacon-Technologie entworfen und mittels Prototyp implementiert, validiert, dokumentiert und veröffentlicht. Der Prototyp soll als Smartphone-App die Standortbestimmung mit der iBeacon-Technologie und die Visualisierung der Po…


B.Eng. Martin Lux,
B.Sc. Jens Wambach,
B. Sc. Benedikt Rauls

LINK

OpenIndy ist eine Open Source-Software, die Im Rahmen einer Projektarbeit des Masterstudiengangs Geoinformatik und Vermessung an der Fachhochschule Mainz erdacht und erstellt wurde. Mit OpenIndy können verschiedene Arten von Messsensorsystemen (Lasertracker, Tachymeter) angebunden werden. Die Messdaten können verschiedenartig ausgewert…


Abschlussarbeiten

Semantic Web und Linked Data: Generierung von Interoperabilität in archäologischen Fachdaten am Beispiel römischer Töpferstempel
Florian Thiery 2013/2014 - HTML

Structure from Motion fĂĽr das Verwitterungsmonitoring
Morad Lahriq 2013 - HTML

Optimierung von Dokumentationsprozessen fĂĽr die Bauforschung
David Schumann 2013 - HTML