Fig. 6. Qantir, Egypt. A palace of Ramses II. The mud brick walls are made by material of different magnetic susceptibility. This explains why they show up in some part as a positive (black) and also as a negative (white) anomaly. However, the bases of the columns were made of sand and limestone and show always a negative (white) anomaly. 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: 43.280 ± 20 nT, date 10/1998, angle of dip +45°, grey shade plot in 256 greyscales from positive (black) to white (negative)