M. Járó - L. Költő szerk.: Archaeometrical research in Hungary (Budapest, 1988)
Prospecting - KISS János, PATTANTYUS-Á. Miklós, SELMECZI László: Geophysical research at a Jazygian' settlement, Négyszállás
0 2.5 5m t i 1 Fig. 3 Maps of the electromagnetic apparent resistivity measurements performed at the NW part of the resistivity map of Fig 2, in the case of horizontal instrument position. Height of the instrument A: 1 m, B; Omfthe excavation site is marked). The effect of the archaeological object scarcely appears when measured at a height of 1 m, and it appears rather blurred when measured on the surface. Measurements were performed in four instrument positions: at heights of 1 m and on the surface , as well as with vertical and horizontal coil positions. The results show that in the case of horizontal coils the measurement integrates effects coming from a too large space, and the depth of penetration is much greater than the depth of the cultivated layer, therefore the archaeological object does not appear as an anomaly. In the case of vertical coils, the effect of the object appears, although slightly blurred, on the electromagnetic apparent resistivity maps (Fig. 3). In order to emphasize this effect, gradient calculation was performed and a much more pronounced anomaly was obtained (Fig. 4). By means of such a map the place of the archaeological object can be defined more unambiguously but the number of anomalies developing due to geological noise, e. g. sand lense, will probably increase (see the NE part of Fig. 4 A).
