Abstract:These data are best suited to graphical applications. These data may vary greatly in quality depending on the method of capture and digitising specifications in place at the time of capture. All features have been included from the 250K data capture. This layer is only for labelling. 250K Specification Description - Reef - An area of rock or coral that is exposed between mean high water and lowest tide, or just below approximate lowest tide, which is visually prominent or a hazard to shipping. Shoal - A detached area of any material the depth over which constitutes a danger to surface navigation of marine craft. The term shoal is not generally used for dangers which are composed entirely of rock or coral. (Source - https://www.ga.gov.au/mapspecs/topographic/v6/appendixA_files/Marine.html)© Commonwealth of Australia (Geoscience Australia) 2017.Downloads and Links:Web ServicesReefs and Shoals MapServer Downloads available from the expanded catalogue link, belowMetadata URL:https://pid.geoscience.gov.au/service/ga/100109