Abstract
In order to obtain maximum information from magnetic anomaly maps, application of an edge detection method is necessary. In this regard two commonly used methods are derivative filters and local phase filters. In this paper we expanded a Matlab code to combine an analytic signal filter and a tilt angle filter as a new edge detection filter, called an ASTA filter. This method was demonstrated on synthetic magnetic data from 3 models and also on real magnetic and gravity data from South West England. Findings show that the boundaries of a causative body are enhanced more accurately using this new filter, compared with other filters. The source code in Matlab format is available from the authors on request.
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