Chennai Corporation has launched a drone-based multispectral tree census program across the city’s green zones, street canopy, and urban wetlands. The drones capture tree count, canopy cover, species type, and health metrics like chlorophyll levels. The data populates a public tree map and aids in heat island and urban planning efforts. 100% of trees in parks and roadsides are expected to be cataloged by 2025. The program also flags disease-affected trees for early intervention.