Data processing device for scanning probe microscope

A data processing device for a scanning probe microscope, the data processing device processing biaxial data indicating a change in a second physical quantity with respect to a change in a first physical quantity, the biaxial data being acquired for each of a plurality of measurement points on a sample surface by scanning the sample surface with a probe using a scanning probe microscope, the data processing device comprising:

• a) a feature amount calculator that acquires one or a plurality of types of feature amounts from the biaxial data at each of the plurality of measurement points;
• b) a feature amount selector that causes a user to select one of the one or the plurality of types of feature amounts;
• c) a two-dimensional mapping image display unit that displays the feature amount at each of the plurality of measurement points on a screen as a two-dimensional mapping image with each measurement point as one pixel based on selection of the feature amount by the user;
• and
• d) a biaxial data display unit that, when the user selects one of the pixels in the two-dimensional mapping image, displays on the screen the selected pixel and the biaxial data of the measurement point corresponding to one or a plurality of pixels adjacent to the selected pixel.