From Geoscience Australia
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

Intertidal Extents Model Relative Extents Model

Created 17/10/2025

Updated 17/10/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

The Intertidal Extents Model (ITEM v1.0) product is a national scale gridded dataset characterising the spatial extents of the exposed intertidal zone, at intervals of the observed tidal range. The current version utilises all Landsat observations (5, 7, and 8) for Australian coastal regions (excluding off-shore Territories) between 1987 and 2015 (inclusive). The Relative Extents Model (ITEM_REL_mosaic_1987_2015.tif) utilises the tidal information attributed to each tile observation to indicate the spatial extent of intertidal substratum exposed at each 10% percentile of the observed tidal range for the cell. Attributes: Single Band Integer Raster: 0 - Always water 1 - Exposed at lowest 0-10% of the observed tidal range 2 - Exposed at 10-20% of the observed tidal range 3 - Exposed at 20-30% of the observed tidal range 4 - Exposed at 30-40% of the observed tidal range 5 - Exposed at 40-50% of the observed tidal range 6 - Exposed at 50-60% of the observed tidal range 7 - Exposed at 60-70% of the observed tidal range 8 - Exposed at 70-80% of the observed tidal range 9 - Exposed at highest 80-100% of the observed tidal range (land) -999 - No Data

Files and APIs

Tags

Additional Info

Field Value
Title Intertidal Extents Model Relative Extents Model
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/08d0861b-7988-4b30-805a-37d479d83e7e
Contact Point
Geoscience Australia Data
earth.observation@ga.gov.au
Reference Period 01/01/2008 - 01/12/2015
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -10.0
      ],
      [
        112.0,
        -10.0
      ],
      [
        112.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Intertidal Extents Model Relative Extents Model". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/intertidal-extents-model-relative-extents-model