Fig. 8. Großprüfening (Bavaria). Typical magnetic anomaly of a huge pottery kiln, with traces of ash layers, that is visible only in the total field mode. Magnetometer survey with Smartmag SM4G-Special caesium-magnetometer, sensitivity ± 10 Picotesla, variometer (duo-sensor) configuration, 40 × 40 m grid, spatial resolution 12.5 × 50 cm, interpolated to 25 × 25 cm, intensity of total Earth's magnetic field at the site: 48.330 ± 20 nT, date 11/2010, angle of dip +65°, grey shade plot in 256 greyscales from positive (black) to white (negative). From left to right: total field measurement, application of a high-pass filter, archaeological interpretation