Spatial assessment of 3-30-300 rule compliance across 862 European cities at 100m resolution

This dataset provides a high-resolution spatial assessment of the 3-30-300 rule—a global guideline for urban forestry and greening—across 862 European cities. The data evaluates the three core pillars of the rule: seeing at least 3 trees from every home, having 30% canopy cover in every neighborhood, and living within 300 meters of the nearest public green space.

Data Content & Format

The primary data is provided as a GeoTIFF raster file at a spatial resolution of 100 meters. The pixel values represent a Compliance Score, indicating the number of satisfied criteria:

• 0: Non-compliant (none of the three criteria are met).

• 1: Low compliance (one criterion met).

• 2: Moderate compliance (two criteria met).

• 3: Full compliance (all three criteria met).

Spatial Extent & City Selection

The study area covers 862 cities across 31 countries (EU27, Norway, Switzerland, Iceland, and the United Kingdom).

• City Definition: We utilized the "City Core" definition (Urban Audit 2021) as established by the OECD and the European Commission, based on population density and administrative boundaries.

• Selection: The dataset includes 729 cities from the 2021 Urban Audit and an additional 133 cities from the United Kingdom (sourced from the 2020 Urban Audit) to ensure comprehensive European coverage.

• Reference Boundaries: The associated city polygon shapefiles used to clip this data can be downloaded via Eurostat GISCO.