3th

August 2022

Our remote sensing products in the National Urban Policy 2030

The Regional Tree Crown Map and the Vegetation Trend Index calculated by the MGGP Aero team were used in the National Urban Policy 2030 (KPM 2030) as a source of information on the condition of greenery in Polish cities.

How were the Regional Tree Crown Map and the Vegetation Trend Index used in the National Urban Policy 2030?

The National Urban Policy 2030 aims to integrate and coordinate policies that relate to cities and urban areas. The document defines support for cities development, improvement of the form of governance and creation of convenient living conditions for inhabitants. Among the eleven challenges defined in the National Urban Policy 2030 are the quality of the natural environment and city adaptation to climate change. It should be noted that the KPM 2030 pays particular attention to the very important role of urban greenery in the effective shaping of the city's climate. According to the KPM 2030:"The presence of trees in urban space, in addition to purely aesthetic issues, is important for the proper functioning of ecosystems and people. Among the greatest benefits are heat reduction, filtering air pollutants and absorbing carbon dioxide, saving energy of surrounding buildings, filtering water, absorbing rainwater, protecting against UV radiation, maintaining biodiversity and having a positive impact on human health." It is impossible to disagree with this statement.

Based on the data we provided from the Regional Tree Crown Map, a map showing the share of area under tree crowns as of 2010-2018 was produced (Fig.1.). This analysis was carried out for 86 urban municipalities, 531 urban-rural municipalities and 310 rural municipalities.

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Fig.1. Share of area under tree crowns in urban, urban-rural and peri-urban municipalities as of 2010-2018, KPM 2030's own compilation based on data from the Regional Tree Crown Map.

We calculated the Vegetation Trend Index using Landsat 8 satellite data according to a methodology based on the Joint Research Centre report - Mapping and Assessment of Ecosystems and their Services: An EU ecosystem assessment. This indicator allows us to assess the direction of change in the quantity and quality of green spaces. In the KPM 2030, it was used to present a balance of the share of areas undergoing greening and browning processes for the period 2013-2021 within the anthropogenic areas of voivodeship cities. In the table below (Fig.2), we can see which cities in Poland are going green (positive values), and which are losing areas covered by vegetation or the condition of this vegetation is deteriorating (negative values).

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Fig.2. Graph of the normalized balance of the share of areas undergoing greening and browning processes for the period 2013-2021 within the anthropogenic areas of voivodeship cities based on the calculated Vegetation Trend Index.

Once again, we can see the wide applicability of the Regional Tree Crown Map and the need for analytical products dedicated to cities, in particular products providing information on the state of the city greenery.