4bff8abf-8e00-4235-a3b8-92895ef75d29 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-25T07:53:35 creation ISO 19115 2016 Woody Age Since Disturbance - Sentinel-2, DETSI Algorithm, QLD Coverage 4bff8abf-8e00-4235-a3b8-92895ef75d29 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). {"type": "Polygon", "coordinates": [[[137.557772, -29.260045], [154.087652, -29.260045], [154.087652, -8.963758], [137.557772, -8.963758], [137.557772, -29.260045]]]} 137.557772 154.087652 -29.260045 -8.963758 Flood N. (2013a). An operational scheme for deriving standardised surface reflectance from Landsat TM/ETM+ and SPOT HRG imagery for Eastern Australia. Remote Sensing, 5(1): 83-109 documentDigital Method documentation HTML Flood N. (2013b). Seasonal composite Landsat TM/ETM+ images using the medoid (a multi-dimensional median). Remote Sensing, 5(12): 6481-6500 documentDigital Method documentation HTML Zhu Z. and Woodcock C. (2012). Object-based cloud and cloud shadow detection in Landsat imagery. Remote Sensing of Environment, 118 (15): 83-94 documentDigital Method documentation HTML Scarth P., Gillingham S. and Muir J. (2008). Assimilation of spectral information and temporal history into a statewide woody cover change classification. Proceedings of 14^th Australasian Remote Sensing and Photogrammetry Conference, Darwin, Northern Territory, Australia, vol. 29. 2008 documentDigital Method documentation PDF Cloud Optimised GeoTIFFs - Woody Age Since Disturbance - Sentinel-2 documentDigital HTML Flood N. (2013a). An operational scheme for deriving standardised surface reflectance from Landsat TM/ETM+ and SPOT HRG imagery for Eastern Australia. Remote Sensing, 5(1): 83-109 documentDigital Method documentation HTML Flood N. (2013b). Seasonal composite Landsat TM/ETM+ images using the medoid (a multi-dimensional median). Remote Sensing, 5(12): 6481-6500 documentDigital Method documentation HTML Zhu Z. and Woodcock C. (2012). Object-based cloud and cloud shadow detection in Landsat imagery. Remote Sensing of Environment, 118 (15): 83-94 documentDigital Method documentation HTML Scarth P., Gillingham S. and Muir J. (2008). Assimilation of spectral information and temporal history into a statewide woody cover change classification. Proceedings of 14^th Australasian Remote Sensing and Photogrammetry Conference, Darwin, Northern Territory, Australia, vol. 29. 2008 documentDigital Method documentation PDF woody_age_since_disturbance documentDigital Woody Age Since Disturbance - Sentinel-2 WMS Flood N. (2013a). An operational scheme for deriving standardised surface reflectance from Landsat TM/ETM+ and SPOT HRG imagery for Eastern Australia. Remote Sensing, 5(1): 83-109 documentDigital Method documentation HTML Flood N. (2013b). Seasonal composite Landsat TM/ETM+ images using the medoid (a multi-dimensional median). Remote Sensing, 5(12): 6481-6500 documentDigital Method documentation HTML Zhu Z. and Woodcock C. (2012). Object-based cloud and cloud shadow detection in Landsat imagery. Remote Sensing of Environment, 118 (15): 83-94 documentDigital Method documentation HTML Scarth P., Gillingham S. and Muir J. (2008). Assimilation of spectral information and temporal history into a statewide woody cover change classification. Proceedings of 14^th Australasian Remote Sensing and Photogrammetry Conference, Darwin, Northern Territory, Australia, vol. 29. 2008 documentDigital Method documentation PDF Landscape Data Visualiser - Woody Age Since Disturbance - Sentinel-2 documentDigital HTML Flood N. (2013a). An operational scheme for deriving standardised surface reflectance from Landsat TM/ETM+ and SPOT HRG imagery for Eastern Australia. Remote Sensing, 5(1): 83-109 documentDigital Method documentation HTML Flood N. (2013b). Seasonal composite Landsat TM/ETM+ images using the medoid (a multi-dimensional median). Remote Sensing, 5(12): 6481-6500 documentDigital Method documentation HTML Zhu Z. and Woodcock C. (2012). Object-based cloud and cloud shadow detection in Landsat imagery. Remote Sensing of Environment, 118 (15): 83-94 documentDigital Method documentation HTML Scarth P., Gillingham S. and Muir J. (2008). Assimilation of spectral information and temporal history into a statewide woody cover change classification. Proceedings of 14^th Australasian Remote Sensing and Photogrammetry Conference, Darwin, Northern Territory, Australia, vol. 29. 2008 documentDigital Method documentation PDF ro-crate-metadata.json documentDigital HTML 2022 Woody vegetation age since disturbance documentDigital JPEG Unnamed resource documentDigital PNG