5a29b3e4-df54-4a22-b644-da86ab4aac60 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-16T23:24:50 creation ISO 19115 2016 DEPRECATED - National Intertidal Digital Elevation Model 25m 1.0.0 5a29b3e4-df54-4a22-b644-da86ab4aac60 This record has been superseded by eCat 149403 The National Intertidal Digital Elevation Model (NIDEM) product is a continental-scale elevation dataset for Australia's exposed intertidal zone. NIDEM provides the first three-dimensional representation of Australia's intertidal zone (excluding off-shore Territories and intertidal mangroves) at 25 m spatial resolution, addressing a key gap between the availability of sub-tidal bathymetry and terrestrial elevation data. NIDEM was generated by combining global tidal modelling with a 30-year time series archive of spatially and spectrally calibrated Landsat satellite data managed within the Digital Earth Australia (DEA) platform. NIDEM complements existing intertidal extent products, and provides data to support a new suite of use cases that require a more detailed understanding of the three-dimensional topography of the intertidal zone, such as hydrodynamic modelling, coastal risk management and ecological habitat mapping. {"type": "Polygon", "coordinates": [[[112.46, -43.72], [153.67, -43.72], [153.67, -10.31], [112.46, -10.31], [112.46, -43.72]]]} 112.46 153.67 -43.72 -10.31 Bathymetry DEM Elevation Intertidal zone Landsat Published_External Superseded by eCat 149403 documentDigital Superseded by eCat 149403 HTML