National Environmental Research Program - Seafloor map of the Flinders Commonwealth MPA

A comprehensive and detailed multibeam sonar-based map of the shelf-break region of the Central Flinders Commonwealth Marine Reserve (CMR). It illustrates the extent that several canyon-head incisions are present in this region, and that inset from the shelf-break is a relatively extensive area of cross-shelf reef. Some of the canyon-head incisions are characterised by exposed reef areas, and these are indicated by localised regions of rapid change in depth. The cross-shelf reef is generally very low profile, but characterised by distinct reef ledges where bedding planes in the sedimentary rock types have eroded. These ledges, often between 1-2 m in height, can run for several kilometres as distinct features. The method of data extraction is based on Lucieer (2013). Three are three classes of seafloor map- one from GEOBIA, one from digitisation and one from Probability of Hardness based on Angular Profile Correction.Lucieer, V (2013) NERP broad-scale analysis of multibeam acoustic data from the Flinders Commonwealth Marine Reserve, Prepared for the National Environmental Research Program. Internal report. IMAS, Hobart, TAS [Contract Report]

本数据集为弗林德斯中央英联邦海洋保护区（CMR）陆坡转折带区域的全面详尽多波束声呐海图。该图清晰展示了本区域内多处峡谷头部侵蚀地貌的分布范围，同时标注了陆坡转折带内侧一片相对广阔的跨陆坡礁体区域。部分峡谷头部侵蚀地貌发育有裸露礁体，此类区域以局地水深快速变化的斑块为特征标识。该跨陆坡礁体整体地势低矮，因沉积岩地层的层面被侵蚀，形成了特征鲜明的礁体台地；这些台地高度多介于1至2米之间，可作为独立地貌延伸数公里。
数据提取方法参考Lucieer（2013）的研究成果。本次海底分类共包含三类结果：分别基于地理对象影像分析（GEOBIA）、人工数字化解译以及基于角度剖面校正的硬度概率模型生成。
参考文献：Lucieer, V（2013）：《弗林德斯英联邦海洋保护区多波束声学数据大尺度分析》，为国家环境研究项目（NERP）编制，内部报告，塔斯马尼亚州霍巴特市南极与海洋研究所（IMAS）[合同报告]