Segers-Glocke, Christiane [Hrsg.]; Niedersächsisches Landesamt für Denkmalpflege [Hrsg.]; Institut für Denkmalpflege [Hrsg.]; Balck, Friedrich [Bearb.]: Arbeitshefte zur Denkmalpflege in Niedersachsen: Aspects of mining and smelting in the Upper Harz Mountains (up to the 13th/14th century) - in the early times of a developing European culture and economy (St. Katharinen: Scripta Mercaturae Verl., Heft 22.2000)

46

Selected sites are surveyed topographically in high resolution using a tachy-
meter in conjunction with the computer program „Trigomat“14 (Fig. 77). This
applies particularly to sites that are characteristic for a group of similar smelters,
where more extensive sampling and excavations are planed. In such cases, it is
desirable to undertake a geophysical survey prior the archaeological investiga-
tions15. Our experiences have shown that particularly the geomagnetic survey
provides invaluable information about the internal structure of the smelter sites,
such as the location of furnace fragments and slagheaps (Fig. 12).


Fig. 12
Site 1549: geomagnetic survey of a lead smelter site with distinct anomalies.

14 Compare also F. Balck in this volume.
15 Many thanks to the Niedersächsisches Landesamt für Bodenforschung, Hannover -
particularly to Prof. Dr. R. Schulz, W. Südekum and J. Sauer - for a longstanding, fruitful
co-operation on the geophysical prospection of selected sites.