A data set generation method is a method of acquiring two-dimensional magnetic properties and includes measuring a first magnetic field strength vector generated in an analysis target in response to first elliptical magnetization applied clockwise, measuring a second magnetic field strength vector generated in the analysis target in response to second elliptical magnetization applied counterclockwise, calculating a first average magnetic field strength vector by averaging the first magnetic field strength vector and the second magnetic field strength vector, calculating a first average magnetic flux density vector by averaging a first magnetic flux density vector corresponding to the first elliptical magnetization and a second magnetic flux density vector corresponding to the second elliptical magnetization, and generating a data set of the two-dimensional magnetic properties that associates the first average magnetic field strength vector and the first average magnetic flux density vector.