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 Many
natural and anthropogenic factors contribute to variations in
soil magnetism.
Magnetic
surveys are comparatively fast, allowing coverage
of large areas. Surveys of larger areas increase the likelihood
of recognition of culturally patterned anomalies in the landscape.
Sampling
density is high, with 16 measurements/m2 common and 32
measurements/m2 frequently undertaken. High sampling densities
contribute to improved anomaly definition (see Effects
of Sampling Density).
Instrument
sensitivity is good, with 0.1 nT resolution common, and some instruments
capable of pushing the limits to .01 nT or better. Improved sensitivity
means better anomaly definition, and the ability to recognize weaker
and deeper anomalies.
Data
processing requirements are moderate.
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Contribution
by: Kenneth
L. Kvamme, Archeo-Imaging Lab, University of Arkansas