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We present a new approach to study planetary nebulae using integral fieldspectroscopy. VLT@VIMOS datacube of the planetary nebula Abell 14 is analysedin three different ways by extracting: (i) the integrated spectrum, (ii)1-dimensional simulated long slit spectra for different position angles and(iii) spaxel-by-spaxel spectra. These data are used to built emission-linediagnostic diagrams and explore the ionization structure and excitationmechanisms combining data from 1- and 3- dimensional photoionization models.The integrated and 1D simulated spectra are suitable for developing diagnosticdiagrams, while the spaxel spectra can lead to misinterpretation of theobservations. We find that the emission-line ratios of Abell 14 are consistentwith UV photo-ionized emission, however there are some pieces of evidence of anadditional thermal mechanism. The chemical abundances confirm its previousclassification as a Type I planetary nebula, without spatial variation. Wefind, though, variation in the ionization correction factors (ICFs) as afunction of the slit position angle. The star at the geometric centre of Abell14 has an A5 spectral type with an effective temperature of Teff = 7909$\pm$135K and surface gravity log(g) = 1.4$\pm$0.1 cm s$^{-2}$. Hence, this star cannotbe responsible for the ionization state of the nebula. Gaia parallaxes of thisstar yield distances between 3.6 and 4.5 kpc in good agreement with thedistance derived from a 3-dimensional photoionization modelling of Abell 14,indicating the presence of a binary system at the centre of the planetarynebula.

Exploring the differences of integrated and spatially resolved analysis using integral field unit data: The case of Abell 14