5Before an investor or developer considers a location, there are a multitude of factors considered. According to industry experts, the most important factors to be considered for 2025 were the market size, liquidity, and the city’s economic performance. London, was considered the leading city for development and investment prospects. Other cities that ranked at the top of investors' lists included Madrid, and Paris.

The vector dataset presents the percentage of green space in densely built-up areas for a series of individual European cities (included in Urban Audit) for the year 2012.

The presence and proportion of green space in densely built-up urban areas is an important aspect of adaptation to climate change. Green space regulates the microclimate of the city, reducing the temperatures. It also reduces the risk of flooding related to heavy precipitation, as vegetation and permeable surfaces retain and infiltrate rainwater, reducing the amount that comes into the drainage system.

Data on green space was obtained from Copernicus Urban Atlas 2012, extracting the Urban Atlas classes treated as green space. The Urban Morphological Area (UMZ) dataset for 2012 and the Eurostat Urban Audit dataset (polygon, 2011-2014) were been used to calculate the total area within the core city. The values were then allocated to the city centroids from the same Eurostat Urban Audit dataset.