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SERVICETECHNOLOGYABOUT USREFERENCESPROJECTS
 NEWS
2 February, 2017
Presentation of Ullastret Monography
MAC Barcelona


March 14, 2014:
Bradford West Yorkshire

Commercial Archaeological
Geophysics Seminar


February 3, 2014: BDG confirmed quality in professional geophysics

January 2014: Book release: Good Practice in Archaeological Diagnostics
Non-invasive Survey of Complex Archaeological Sites. Editors: C. Corsi, B. Slapsak, F. Vermeulen. Springer








 PARTNERS
COOPERATIVE PARTNERS
Archaeology
RADIO PAST
www.radiopast.eu
EU funded project
in the 7th FWP at the
University of Evora (Portugal)


Exzellenzcluster TOPOI

www.topoi.org
Freie Universität Berlin /
Humboldt-Universität
zu Berlin

Grupo ánfora, G.I.P.
www.anforagip.com
Huelva, Spain

Topographical Survey

arqueocad, S.L., Córdoba, Spain
www.arqueocad.com

Geophysical Modelling
Dr. Thomas Günther;
Hannover
www.resistivity.net

Prof. Dr. Andreas Weller,
TU Clausthal
www.ifg.tu-clausthal.de

3D models
cdmb architects, Berlin www.barlieb.com
Resistivity  Detection of underground structures with resistivity methods is possible using the specific electrical conductivity (σ) or the specific electrical resistivity (ρ; ρ = 1 / σ). Hence archaeological features can be mapped when they are of higher or lower resistivity than their surroundings. In general walls and foundations show through an increase in resistivity whereas ditches and pits show through an increase in conductivity.

To define the electrical characteristics of an area several metal probes (electrodes) are placed into the ground. Two probes are used to inserted an electrical current (I) into the earth. Thus the potential difference (U) between two other probes and therewith the electrical resistivity is obtained. Besides that the specific resistivity depends on a geometry factor defined by the exact position of each probe in the measurement.

Various configurations of electrodes and a wide range of geoelectrical investigation methods exist. To detect near surface resistivity anomalies geoelectrical mapping is most efficient. In order to reach a greater depth of penetration multi-electrode-measurements are used. They result either in 2D-vertical sections or 3D-models of the resistivity distribution and give information about the depth of expected
underground structures.

Using state-of-the-art multi-electrode systems eastern atlas is able to do 1D sounding, 2D mapping and sounding as well as 3D electrical resistivity tomography (ERT). Furthermore we use the method of induced polarization (IP) - a technique that benefits of the phase shift between electrical current and voltage – for archeometallurgical investigations and in search for buried wooden structures. We also apply inductive electromagnetic measurements for large scaled agricultural prospections. One advantage of the latter is that it does not require direct contact with the ground. Thus the conductivity distribution of large areas is detected and soil categories can be classified quick and easily.

Resistivity field work and data examples:
Resistivity instrument in field
sheme of 2D resistivity imaging
IP (Induced Polarisation) measurements on slag heap
3D IP model of a slag heap
(© Th. Günther / C. Rücker)
Resistivity profile on the hill fort of Lossow
 DOWNLOAD
ARCHAEOPROSPECTION
Brochure (German)
download


TECHNOLOGY
Geomagnetics (German)
download
IP geoelectrics at slag heaps (English)
download
(Poster at Conference on "Early Iron in Europe – Prehistoric and Roman Iron Production", Hüttenberg, Austria, Sept. 2008)


ENGINEERING AND
ENVIRONMENTAL GEOPHYSICS

Geophysics in civil engineering
download
(Excerpt of a dissertation at
TU Berlin by Dipl.-Ing. Holger Böhm, in German)


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