The Mayor's Street Tree Initiative map

The Mayor’s Street Tree Initiative ran from 20012-2015, it encouraged applications that increased tree cover in areas of relatively low canopy or areas of poor air quality. The map data has not been updated since 2012 and is shown for reference only.

You can select or deselect these layers using the tick boxes provided at the bottom of the map. When the map first opens the tree canopy cover data is shown by default. Please click on an area of interest to display more information.

Notes on the map layers:

Tree canopy cover: Estimates of tree canopy cover by ward. Darker areas represent higher tree canopy cover, light areas show low canopy cover. Tree canopy categories are indicative, derived from an automated analysis of three layers of spatial information. Source: GLA and The GeoInformation Group, 2012.

Air quality: This is an average of Particulate Matter (PM₁₀), Nitrogen Oxide (NOx) and Nitrogen Dioxide (NO₂). Light areas represent poor air quality. Emissions data are modelled and based on cells (20 metre grid squares). Air quality categories are indicative, derived from the GLA London Atmospheric Emissions Inventory 2008.

When both layers are displayed together, the lighter areas are those which have poorer air quality and low tree canopy cover.