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Urban Tree Canopy Mapping

Definition

Urban tree canopy mapping quantifies the amount and distribution of tree cover across a city using aerial imagery, LiDAR, and field surveys. Outputs include percent canopy by block or parcel, species or structural classes where data allow, and change over time. Canopy maps link to heat mitigation, stormwater interception, habitat, and social equity, guiding investment in planting and maintenance.

Application

Cities set canopy goals, target planting in heat- and flood-prone neighborhoods, plan maintenance cycles, and track losses from pests or storms. Utilities manage clearance; insurers and researchers assess risk and benefits.

FAQ

How does LiDAR improve canopy estimates versus imagery alone?

LiDAR captures 3D structure—height and crown shape—separating trees from shrubs and improving change detection and biomass estimates.

What makes an equitable planting strategy?

Prioritize neighborhoods with low canopy and high vulnerability, ensure long-term maintenance funding, and involve residents in species selection.

How to measure survival, not just planting counts?

Establish re-inventory cycles, use sample plots or remote sensing to track survival rates, and adjust contracts to reward canopy established after several years.

What pitfalls arise from relying on percent canopy alone?

Percent can hide street-level shade needs; combining canopy with pedestrian exposure and land use yields more actionable plans.