Galaxies NGC 1796 and NGC 1705 as examples of our working sample. From top left to bottom right for each galaxy: three-color composite image (A) based on synthetic V, I, and R band images obtained from the MUSE cubes, overplotted with the isophotal ellipses of galaxy in a 0.2R_e interval (the white ellipse represents 1R_e); the Hα emission-line map (B) and its velocity field (C); the Hα velocity along the major or minor axis (D); the 12+log(O/H) map (E); and its distribution as a function of galactocentric radius (F). In panel F, the data points are color-coded by SFR, and the red triangles are the median values for each 0.2R_e interval, with error bars denoting the standard deviation. The dashed line corresponds to the best-fit linear relation of the data points. Similar figures for the other galaxies in our sample can be found at https://github.com/Count-Lee/metallicity-gradient.