Smooth contouring of geophysical data is generated by USGS smooth contouring and plotting system of geophysical data having less artifacts, based on Surfer compatible minimum curvature program. A system and a method are provided, which converts the gridded file generated by USGS package to an ASCII file and the headers of files are removed. Blanks in the gridded USGS files are substituted by value compatible to SURFER software and the headers of SURFER are incorporated. With these changes the contour plots are smooth and can be run from any available personal computer.