| Source Edge Detection SED GX |
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SED GX estimates the location of abrupt lateral changes in magnetization or mass density of upper crustal rocks. Its procedure is to identify maxima on a grid of horizontal gradient magnitudes.
Using the technique of Cordell and Grauch (1982, 1987) a database of source edge locations are derived from a grid of total magnetic field or gravity. A map is produced with - symbols representing locations and gradient directions of potential field anomalies. You can distinguish between gradients that are in 1, 2, 3 or 4 directions.
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