This dataset represents New South Wales 5 metre Digital Elevation Model (DEM) which has been derived from LiDAR and merged together from various projects and will be continually updated.

<b>This service with existing dataset is migrated to a new server and the existing links will expire by the end of this year (31-Dec-2024). The replacement service is located at https://services.ga.gov.au/gis/rest/services/DEM_SRTM_1Second_Hydro_Enforced_2024/MapServer</b> This Service represents the National DEM 1 Second Hydrologically Enforced product derived from the National DEM SRTM 1 Second and National Watercourses, lakes and Reservoirs

This Service represents the 5 metre Digital Elevation Model (DEM), with national coverage. It is derived from merged LiDAR and various projects. New data will be added to the service as it becomes available.

This service represents a hill shade (ground surface topography) and excludes vegetation features which has been dervied from the National DEM SRTM 1 Second. The sun angle used is 315 degrees azimuth and 45 degrees altitude. It is intended for large scale use for low lying area feature identification. The processing method is decsribe in the 1 Second SRTM Derived Product User Guide (Geoscience Australia, 2011)

This dataset represents Queensland 5 metre DEM which has been derived from LiDAR and merged together from various projects and will be continually updated.

<b>This service with existing dataset is migrated to a new server and the existing links will expire by the end of this year (31-Dec-2024). The replacement service is located at https://services.ga.gov.au/gis/rest/services/DEM_SRTM_1Second_Hydro_Enforced_2024/MapServer</b> This Service represents the National DEM 1 Second Hydrologically Enforced product derived from the National DEM SRTM 1 Second and National Watercourses, lakes and Reservoirs

This service represents the National DEM 1 Second Smoothed Aspect product

The Digital Elevation Model (DEM) 25 Metre Grid of Australia derived from LiDAR model represents a National 25 metre (bare earth) DEM which has been derived from some 236 individual LiDAR surveys between 2001 and 2015 covering an area in excess of 245,000 square kilometres. These surveys cover Australia's populated coastal zone; floodplain surveys within the Murray Darling Basin, and individual surveys of major and minor population centres. All available 1 metre resolution LiDAR-derived DEMs have been compiled and resampled to 25 metre resolution datasets for each survey area, and then merged into a single dataset for each State. These State datasets have also been merged into a 1 second resolution national dataset.

This Service represents the National Flow Direction Grid of Australia. Based on a grid spacing of 9 seconds in longitude and latitude (approximately 250 metres) in the GDA94 coordinate system derived from the DEM SRTM 9 Second product

This dataset represents Northern Territory 5 metre DEM which has been derived from LiDAR and merged together from various projects and will be continually updated.