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Layer Methodology

Urban Forest Inventory

Municipal tree inventories enriched for climate, biodiversity, and ecosystem-service analysis.

Snapshot6 cities

Map Role

Public tree records with species, size, carbon, and ecosystem-service attributes.

What It Shows

This is the core public tree inventory used across the map. It combines municipal records with enrichment for carbon, value, native status, invasive status, and age-related context where available.

Sources

  • Municipal open-data tree inventories curated by Rangifer
  • Species, carbon, and ecosystem-service enrichment derived during ETL

Method

  1. 1.Standardize municipal schemas into a shared point-record format.
  2. 2.Keep species, location, diameter, and planting-year fields when present.
  3. 3.Attach derived fields such as carbon storage, ecosystem value, native status, and invasive flags.
  4. 4.Publish the result as a PMTiles vector source for map rendering and viewport analysis.

Refresh Cadence

Snapshot ETL. Refresh when a city inventory is updated or enrichment logic changes.

Coverage

Montreal, Toronto, Vancouver, Calgary, Edmonton, and Winnipeg public tree inventories.

Key Fields

species

Scientific species name used for biodiversity and enrichment workflows

dhp

Diameter at breast height, used for age and ecosystem-service estimates

carbon_kg

Estimated carbon storage or sequestration proxy

value_cad

Estimated ecosystem-service value

is_native

Native species flag when classification is available

is_invasive

Invasive species flag when classification is available

Caveats

  • Coverage reflects public inventories, not complete urban canopy or private trees.
  • Field completeness varies by municipality, especially for planting year and diameter.
  • Derived ecological fields are model-based and should be treated as analytical proxies.