Example of an outcome from our 3D fitting for one PNe source (61), located in the central region of FCC 219 (see Fig. 2). For each of the 9 ×  9 spaxels plotted, the corresponding wavelength range spans 4950–5080 Å. The scale of the y-axis is chosen arbitrarily to best illustrate our fits. Spectral data are shown in black, and our [O III] model is shown in red. The entire 9 × 9 spaxel region is displayed to highlight the expected variation in signal (central pixels) and noise (outer pixels). Each spaxel corresponds to a spatial scale of 0.2 arcsec.