Density of indicative threatened ecological community distributions

##### Abstract The density of indicative threatened ecological community distributions is derived from the Department's ecological communities of national environmental significance data. Threatened Ecological Communities (TEC) distributions contain three categories to indicate where their habitat is known, likely or may occur across Australia. The spatial input data was filtered using the following criteria: 1. Distributions for EPBC Act (1999) listed TECs that are Matters of National Environmental Significance (critically endangered or endangered). 2. Contains ‘known’ and/or ‘likely to occur’ habitat categories. 3. Marine TECs are included The number of overlaps for each mapped distribution in the selected feature set were counted and gridded to a 0.01 decimal degree (~1km) cell size. Note projecting the data will alter the cell size. The source distribution for each TEC is determined independently of others and is indicative in nature. As such, a count higher than one may indicate: * TECs have been mapped in the same habitat or * TECs are mapped adjacent within the same 1km grid cell or * TECs distributions have been mapped at different scales or levels of detail Given the indicative nature of the source data which includes data of a range of quality and currency, this output should be used as a guide to the location of TECs across the country. The selection of TEC distributions for inclusion in the count is based on the EPBC Act list of TECs and spatial data in the Department enterprise GIS as at the revision date in the metadata. Current EPBC Act listed TECs are described in the Species Profiles and Threats application (SPRAT: https://www.environment.gov.au/cgi-bin/sprat/public/sprat.pl). ##### Currency Date modified: 19 May 2026 Date published: 27 August 2024 Modification frequency: As needed ##### Data extent Spatial extent North: -12.24° South: -43.63° East: 153.64° West: 115.01° Coordinate reference: Geocentric Datum of Australia 1994 (GDA94, EPSG:4283) ##### Source information Click [here] to access the download. Click [here ]to access the Image Service. ##### Lineage statement The density of modelled distributions for threatened ecological communities distributions is derived from the Department's ecological communities of national environmental significance data. The distributions are stored in the enterprise GIS in vector format. This spatial input data was filtered using the following criteria: 1. Distributions for EPBC Act (1999) listed TECs that are Matters of National Environmental significance (critically endangered or endangered). 2. Contains ‘known’ and/or ‘likely to occur’ modelled habitat categories. 3. Marine TECS are included. A pre-existing, regularly updated, 1km gridded version of the TECs dataset was chosen as the input to reduce generalisation, processing time processing time and to produce an output of the same resolution. The number of overlaps of distributions in the selected vector feature set were counted and gridded to a 0.01 decimal degree cell size using the Count Overlapping Features and Polygon to Raster ArcGIS Pro 3.0.0 tools called from within an FME Form 2024.0 workbench. The CENTRE CELL method was used with no priority field set. The cell size projection method was also set to preserve resolution. A GDA94, 0.01 decimal degree snap raster with extent West -180.000000, East -179.990000, North 90.000000, South 89.990000 was used for gridding and generalising the raw data. The FME workbench will be rerun after major updates of the spatial data or updates to the list of TECs under the EPBC Act. The resultant dataset will be published as web service on [https://fed.dcceew.gov.au/]. Given the indicative nature of the source data which includes models of a range of quality and currency, this output should be used as guide showing the relative density of indicative habitat for the set of TECs selected. ##### Data dictionary ───────────────────┬─────────────────────────────────────────────────────────────────────────────────────────────────────── Attribute name │Description ───────────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────── OBJECTID │A unique system-generated identifier for each feature or record in the dataset. ───────────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────── Name │The name of the dataset queried. ───────────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────── Cateogry │Category classification. ───────────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────── Service Pixel Value│The unique raster pixel value representing the mapped density or service-derived value for the feature. ───────────────────┴─────────────────────────────────────────────────────────────────────────────────────────────────────── ##### Contact Department of Climate Change, Energy, the Environment and Water, [geospatial@dcceew.gov.au]