Abstract：The results of various geophysical explorations are usually descrihed using data,such as the depth of a formation interface,and gravity Values in an area.These !iata include two kinds of information: general tendency (regional background) and local various(residual values after removing (regional background).Converting discrete datum (such as depth) points into stratigraphic interface which reflects structue shape can be achieved using mathematic curved sureface fitting,yeoumreb carved surface fitting metilorl for tendency surfacc analysis is recommended and compared with least square,fitting method.Experiments show that yeoumreb curved surface fitting method is superior to least square fitting method.
