The diagram is a derivative from the map 2.5. Green (vegetated) and blue (water) urban areas have been extracted from the Urban Atlas product, i.e. values for 369 core cities are available. The considered area is the UMZ inside the core city area (defined in Urban Atlas). The selection of classes contained in the green and blue urban areas is based on their relevance for the Urban Heat Island effect. The following selection has been made, all classes marked in green are components of the green and blue urban areas:
Urban Atlas classes
Discontinuous Low Density Urban Fabric (S.L. : 10% - 30%)
Discontinuous Very Low Density Urban Fabric (S.L. < 10%)
Green urban areas
Sports and leisure facilities
Agricultural areas, semi-natural areas and wetlands
Those classes were extracted from the Urban Atlas, their area summed up and its share in relation to the total area of the city (core city-UMZ) calculated. For the map production the values were classified into 4 classes and presented as different colours.
The diagram is produced by summarising the single city information into country related information.
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