K. Palágyi Sylvia szerk.: Balácai Közlemények 2005/9. (Veszprém, 2005)
NEDUCZA, BORI SZLÁV - PATTANTYÚS-Á., MIKLÓS: Combined radar mapping of North-East corner of the roman Villa-estate, Baláca
about 16 hectare with the location of discovered buildings, walls and the round-walls. The excavation of the later age was carried out between 1976 by S. Palágyi, who makes great effort and work on both the excavation and restoration till now. During this period, also aerial photographs were made, on the basis of which and using the excavation results and the surface observations, the original site map was corrected. In 1984, she asked experts of ELGI 1 to help in delineating known and unknown buildings of the site with geophysical tools. Preliminary prospecting in 1984 and verification of results A rather large area was prospected using the twenty years earlier techniques, with a large-scale resistivity profiling. Resistivity measurements referring to two depths were carried out at a site of about 6000 m 2 , in total length of 2000 m. The profile separation varied between 2 and 10 m, according to the surface possibilities. The field technique of the measurements was rather cumbersome and time-consuming. However, the analogue data collected by hand could be processed by computer and resulted in a resistivity anomaly map that showed the location of both known and also unknown building-groups. Results of this project were published on conferences and in reports and technical articles. 23 During the period of 1984-99, the activity of excavation and restoration was in the front, no geophysical survey was carried out. The buildings and remnants discovered and delineated earlier by the resistivity measurements were excavated, some of them were restored and the exhibition centre around the main building No. 1 was built up and completed. The excavation verified the geophysical interpretation and demonstrated its usefulness for archaeological purposes. After 15 years, a new project started in geophysical research applying a much more advanced technical background (technology, hardware and software). Prospecting in the near past (1999-2001) At the first time, we wanted to compare the results of the resistivity and the GPR methods. Resistivity profiling was carried out using two metres line separation and measuring values referring to three depths. At the same site we performed GPR profiling along the same lines, using the Noggin type instrument working at 250 MHz frequency. The resistivity anomaly maps showed the extension of building but gave no information on the location of walls. As a summary, the resolution was not satisfactory. The interpretation of radar sections located the walls itself well, and also the debris zones could be delineated. 4 Finally, almost the complete ground-plan of the subsurface building remnants could be defined. This measurement was carried out around the building under excavation No. XVII.
