Examples of spatially-resolved emission-lines measurements in two MASSIV galaxies (top: VVDS220578040, bottom: VVDS140217425). Color-coded images show the regions defined with Hα contours used to derive the metallicity gradients. The 1D spectra integrated over the different regions are shown with solid black lines. Model (in red) and sky (dashed line) spectra are also shown. The sky spectrum is used as a weight in the fitting procedure. Region 1 is the farthest out with the region number increasing towards the center.