Curio Canopy - London Tree Canopy Cover

A high resolution map of tree canopy cover for Greater London was produced from aerial imagery using machine learning techniques. The map was produced by Breadboard Labs in collaboration with the Greater London Authority as part of a Breadboard Lab’s European Space Agency funded project, Curio Canopy .

The algorithms and machine learning based techniques used to produce the canopy map were developed using Google Earth Engine which was also leveraged to perform the processing needed to create a pan-London high resolution (25 cm per pixel) tree canopy data. Full details of the methodology are documented here.

Final canopy layers have been made available to download below in a geospatial format (KML).

The pan-London high resolution canopy layer has also been aggregated to: hexagon grid, Lower Super Output Area (LSOA), Ward (2014) and London Borough geographies.

Creative Commons Attribution Share-Alike

Last Update

5 years ago

Contact

GLA GIS

Update Frequency

One off

Geographic Coverage

Local Authority
Ward
Lower Super Output Area
Other

11 files

curio-tree-canopy-cover-methodology-report-nov-2018.pdf

A report describing the machine learning and image processing techniques used to generate the canopy map as well as the series of evaluations that were carried out to determine its accuracy and error characteristics.

gla-boroughs-canopy-cover.kml

Summary Curio canopy layer for London Boroughs.

Projection: (EPSG: 4326, WGS 84)

gla-wards-canopy-cover.kml

Summary Curio canopy layer for London 2014 wards.

Projection: (EPSG: 4326, WGS 84)

gla-canopy-lsoas.csv

Summary Curio canopy layer for London Lower Super Output Areas (LSOAs).

gla-lsoa-shp.zip

Summary Curio canopy layer for London Lower Super Output Areas (LSOAs).

Projection: (EPSG: 27700, British National Grid)

gla-lsoa-kml-files.zip

Summary Curio canopy layer for London Lower Super Output Areas (LSOAs).

Projection: (EPSG: 4326, WGS 84)

gla-canopy-hex.csv

Summary Curio canopy layer for London Hexagons. The Hexagon geography was developed by Transport for London (TfL), it contains 15,041 hexagons covering the extent of the GLA surface area. Each hexagon measures 350m across, and is oriented so that the flat sides at top and bottom are horizontal.

shp-hexagon-files.zip

Projection: (EPSG: 27700, British National Grid)

gla-hexagon-grid-canopy-cover.kml

Projection: (EPSG: 4326, WGS 84)

gla-canopy.zip

Detailed high resolution vector Curio canopy layer for Greater London area. The process used to convert the original raster canopy map to vectors may very occasionally, in some extreme edge situations, introduce artefacts not present in the original raster output.

467 KML 'tiles' are contained within the zip file. Please use 'tile grid lookup' to locate tiles across London.

Projection: (EPSG: 4326, WGS 84)

tile-grid-lookup.zip

A lookup (as ESRI Shapefile and PDF) to be used with the gla-canopy.zip KML tiles.

ESRI Shapefile is projected as EPSG: 4326, WGS 84