Automated trend reinforcement of aeromagnetic data

Aeromagnetic maps poorly represent lineaments that are at acute angles to the flight‐line direction. Commonly used gridding algorithms cannot cope with local trends, magnetic anomalies at an angle with the main trend of the map, and tend to generate closed contours around the flight lines. By introducing some a priori information, it is possible to add extra data between the flight lines, i.e. trend lines, to reinforce local trends. The …