The noise map of Alella is a set of cartographic information whose purpose is to prevent or reduce the noise pollution to which the population is exposed and the preservation or improvement of the acoustic quality of the territory. The dataset is made up of a four-sheet map in PDF format, representing vector levels of emission levels set as quality goals in each given territory using vector data. The map classifies the Alella territories into: High acoustic sensitivity zone (A), Moderate acoustic sensitivity zone (B), Low acoustic sensitivity zone (C); categories that are broken down into subcategories referenced with an alphanumeric code.