2.1.3. Green space data and indicatorsGreen spaces at this level are divided in three categories,namely: a) Agricultural areas, b) Forest areas, and c) Urban greenareas. These categories have already been defined in the Urban Atlasland use dataset (European Environment Agency, 2010), wheregreen space data was downloaded from. Accordingly the corre-spondent indices are expressed as the coverage ratio per categoryand as the percentage per person (Table 2). From the noise perspec-tive these areas represent the porous surfaces with higher soundabsorption than rigid surfaces.