20260810 16590500 1.0 TRUE Marine_Hazard_Polys Reef - An area of rock or coral that is exposed between mean high water and lowest astronomical tide, or just below approximate lowest tide, which is visually prominent or a hazard to shipping. These features include some of the features from Framework and Administration themes of the Geoscience Australia 2.5 Million, 1 Million and 250K Topographic Data. © Commonwealth of Australia (Geoscience Australia) 2016. Creative Commons Attribution 4.0 International Licence.