ACT Mature Tree Crown Polygons Derived from 2020 LiDAR

2020 LiDAR-derived canopy polygons for mature trees in Canberra, defined as crowns larger than 100m2 and taller than 8 metres. The dataset includes native and non-native species and estimates tree height, created by the ACT Government using a marker-controlled watershed delineation method. Data capture occurred in April 2020.

Use Cases

• Analyze urban forest maturity and distribution based on canopy footprint and height thresholds
• Model urban cooling and habitat connectivity based on tree crown coverage
• Assess tree loss or conservation efforts using geospatial tree crown polygons
• Estimate biomass or carbon storage based on LiDAR-derived tree height and crown size

Strengths

• Tree crowns are defined by specific, quantitative criteria: larger than 100m2 footprint and higher than 8 metres
• Derived from high-resolution (1 metre) 2020 LiDAR Canopy Height Model
• Includes both native and non-native tree representation

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download
• Column-level documentation is absent; field semantics must be inferred after download
• Data may reflect geographic bias inherent to data_gov_au, focusing solely on Canberra, ACT

Provenance

Source

ACT Government Geospatial Data Catalogue (ACTmapi)

Collection Method

Tree crowns delineated from 2020 LiDAR CHM using a marker-controlled watershed method and variable window filter in R.

Time Range

April 2020

Freshness

Last updated 2026-04-04 03:01:16.236119; freshness should be verified

Geography

Canberra, Australian Capital Territory (ACT)