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Aims: Integral Field Spectroscopy (IFS) is a powerful approach for the studyof nearby galaxies since it enables a detailed analysis of their resolvedphysical properties. Here we present the sample of nearby galaxies selected toexploit the two dimensional information provided by the IFS. Methods: Weobserved a sample of 48 galaxies from the Local Universe with the PPAK IntegralField Spectroscopy unit (IFU), of the PMAS spectrograph, mounted at the 3.5mtelescope at Calar Alto Observatory (Almeria, Spain). Two different setups wereused during these studies (low -V300- and medium -V600- resolution mode)covering a spectral range of around 3700-7000 Angs. We developed a fullautomatic pipeline for the data reduction, that includes an analysis of thequality of the final data products. We applied a decoupling method to obtainthe ionised gas and stellar content of these galaxies, and to derive the mainphysical properties of the galaxies. To asses the accuracy in the measurementsof the different parameters, we performed a set of simulations to derive theexpected relative errors obtained with these data. In addition, we extractedtwo aperture, central and integrated spectra, from the datacubes. The mainproperties of the stellar populations and ionised gas of these galaxies and anestimate of their relative errors are derived from those spectra, as well asfrom the whole datacubes. Results: The comparison of the central spectrumextracted from the datacubes and the SDSS spectrum for those galaxies in commonshows a good agreement between the derived values from both samples. We finddifferences in the properties of galaxies when comparing a central and anintegrated spectra, showing the effects of the extracted aperture in theinterpretation of the data. Finally, we present two dimensional maps of some ofthe main properties derived with the decoupling procedure.

Integral Field Spectroscopy of a sample of nearby galaxies. I. Sample, Observations and Data Reduction