F2E40C7CAE6D0C61E0532144CD9B7350EnglishData Requests OfficerDepartment of Lands, Planning and EnvironmentGeospatial Services Unit (on behalf of department)Datarequests.DLPE@nt.gov.au2023-04-18AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile1.0SREBA Beetaloo Vegetation Map2022-11-29The distribution of broad vegetation groups were mapped across the Study Area at a scale of approximately 1:100 000 using an Object Based Image Analysis (OBIA) approach. Field survey data was used to train a random forest model, along with a set of image data layers that are likely to discriminate between the classes and predict their distribution across the Study Area. Detailed methods and results for the vegetation mapping are provided in Chapter 3 of: Young L, Patykowski J, Leiper I, Nano C, Fisher A, Gillespie G, Barnett G, Buckley K, Hanrahan N, McDonald P, Miller A, Ribot R, Ruykys L, Stewart A, Zimny A (2022). Terrestrial Ecosystems Baseline Report: Strategic Regional Environmental and Baseline Assessment for the Beetaloo Sub-basin. DEPWS Technical Report 36/2022. Flora and Fauna Division, Northern Territory Department of Environment, Parks and Water Security, Darwin.You are licensed to use the geospatial products on the terms and conditions set out in: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) at: creativecommons.org/licenses/by/4.0/legalcode If you do not agree to the terms and conditions you must not use the geospatial products. You are free to copy, communicate and adapt the licensed material, provided that you abide by the licence terms (including Attribution) and attribute the licensed material using the statement: Supplied by the Department of Environment, Parks and Water Security. Copyright Northern Territory GovernmentEnglish-18.081865-14.743686131.617499135.6515072022-11-292023-01-23datasetnot knownVersion 1 of this spatial dataset is considered complete. If amendments are made to this dataset, a new version will be released.0not knownGIS editing tools were used to rectify all overshoots and undershoots in line work. Polygon topology rules applied are; must not overlap, must not have gaps and each polygon has only one label.0not knownPOLYGON DATA - Polygon boundaries were generated from rectified Sentinel-2 image data provided by QDES with a geometric accuracy of less than 12.5 m (ESA, 2015). This level of accuracy is generally considered high to very high.0not knownAttribute values, as described in the Data Dictionary below, have been added to each polygon.0The distribution of vegetation communities was mapped across the study area using an Object Based Image Analysis (OBIA) approach. Spatial data included - Sentinel-2 2020 annual composite image - vegetation indices derived from the Sentinel-2 2020 annual composite image - seasonal fractional cover derived from Sentinel-2 2020 image data - canopy height model - Hydrologically enforced Digital Elevation Model (DEM-h) - slope and relief derived from DEM-h - Geoscience Australia Landsat Water Observation Statistics Collection 3 - Maximum Extent of Surface Water - Distance to Mapped Stream. Objects were created using the multiresolution segmentation algorithm with a scale parameter of 100 and using an equal weighting of eight image layers: five Sentinel-2 2020 annual composite bands (Blue, Green, Red, Near Infrared, Short Wave Infrared 2) and three vegetation indices (NDVI, NDWI, MSAVI). To classify the objects as vegetation communities, field data points assigned with a vegetation community attribute were used to train a random forest model that was then applied across the study area. All image layers were included as parameters for the random forest model, using the mean and standard deviation calculated for each object for each layer. The classified objects were then exported as polygons in shapefile format for further assessment and post-processing. Detailed methods and results for the vegetation mapping are provided in Chapter 3 of: Young L, Patykowski J, Leiper I, Nano C, Fisher A, Gillespie G, Barnett G, Buckley K, Hanrahan N, McDonald P, Miller A, Ribot R, Ruykys L, Stewart A, Zimny A (2022). Terrestrial Ecosystems Baseline Report: Strategic Regional Environmental and Baseline Assessment for the Beetaloo Sub-basin. DEPWS Technical Report 36/2022. Flora and Fauna Division, Northern Territory Department of Environment, Parks and Water Security, Darwin.