The values of analyticalcontinuation at different depths from the potential field downward constitute the continuation field, on which the principal component analysis is made.
位场向下在不同深度上解析延拓的值构成延拓场，可对延拓场进行主成份分析。
2
In the analyticalcontinuation data processing of gravity and magnetic field, the important practical problem is the automatic reading decision for template access and its implementation on computers.