Fig. 9. Burgsalach, Bavaria. The magnetometer image processed as a pseudo 3D-image of a Roman camp revealed very clearly two archaeological phases of the fortification. 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: 48.220 ± 20 nT , date 4/2008, angle of dip +65°, grey shade plot in 256 greyscales from positive (black) to white (negative)