Urban Green Monitoring

Click to enlarge

People like to live and work in a green environment. According to various studies, there is a significant positive relation between quality of life and urban green. Therefore, public and private decision-makers want and need better information about the quantity and quality of urban green available in their city. For the everyday use of green spaces (recreation, relaxation and sport), it is important to have a clear idea on the location and the extent of public and private green areas close to housing. How many green areas are there in your town?

The “Urban Green Map” gives a spatial inventory of all green areas (public as well as private). The product is derived from colour infrared imagery using a semi-automated methodology. The product can be based on very high resolution satellite images or digital aerial images (resolution: <1m). The resulting dataset has an applicable scale of 1:4.000-1:25.000, and an accuracy of at least 90%. The map can be based on recent imagery as well as on historical image data (historical mapping).

Click to enlarge - Urban Green Map, Enschede (the Netherlands)

Based on the Urban Green Map, a set of derived products can be developed:

Urban Green classification: a distinction between public and private green can be made by adding property information

Urban Green monitoring: monitoring the evolution of urban green over time by the detection of changes.

Green roof detection: green roofs can be mapped by making a division between “ground” green and “elevated” green. With this information EUROSENSE can monitor and control subsidies for green roofs provided by cities or regional administrators.

 Urban Green indicators: sustainable indicators can be derived from the “Urban Green map”. E.g. calculation of “green necessity”, providing a threshold to understand if the current public green supply is sufficient or if action is needed.

Click to enlarge - Green Necessity Map