From Terrestrial Ecosystem Research Network
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Woody Age Since Disturbance - Sentinel-2, DETSI Algorithm, QLD Coverage

Created 25/06/2025

Updated 26/09/2025

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The woody vegetation extent for Queensland is attributed with an estimated age in years since the last significant disturbance. The method uses a sequential Conditional Random Fields classifier applied to Landsat time series starting 1988 to predict woody cover over the time period. A set of heuristic rules is used to detect and track regrowing woody vegetation in the time series of woody probabilities and record the approximate start and end dates of the most recent regrowth event. Regrowth detection is combined with the Statewide Land and Trees Study (SLATS) Landsat historic clearing data to provide a preliminary estimate of age since disturbance for each woody pixel in the woody extent. The 'last disturbance' may be due to a clearing event or other disturbance such as fire, flood, drought-related death etc. Note that not all recorded disturbances may result in complete loss of woody vegetation, so the estimated age since disturbance does not always represent the age of the ecosystem. The age since disturbance product is derived from multiple satellite image sources and derived products which represent different scales and resolutions: Landsat (30 m), Sentinel-2 (10 m) and Earth-i (1 m).

Files and APIs

Additional Info

Field Value
Title Woody Age Since Disturbance - Sentinel-2, DETSI Algorithm, QLD Coverage
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/4bff8abf-8e00-4235-a3b8-92895ef75d29
Contact Point
Terrestrial Ecosystem Research Network's Data Discovery
eossdataenquiries@detsi.qld.gov.au
Reference Period 01/01/1988 - 31/12/2022
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        137.557772,
        -29.260045
      ],
      [
        154.087652,
        -29.260045
      ],
      [
        154.087652,
        -8.963758
      ],
      [
        137.557772,
        -8.963758
      ],
      [
        137.557772,
        -29.260045
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Terrestrial Ecosystem Research Network

Data Source

This dataset was originally found on Terrestrial Ecosystem Research Network "Woody Age Since Disturbance - Sentinel-2, DETSI Algorithm, QLD Coverage". Please visit the source to access the original metadata of the dataset:
https://geonetwork.tern.org.au/geonetwork/srv/eng/csw/dataset/woody-age-since-disturbance-sentinel-2-detsi-algorithm-qld-coverage