Methodologies for multibeam seabed hardness mapping in the Timor Sea - Topographic Position Index

This dataset contains topographic position index data from seabed mapping surveys on the Van Diemen Rise in the eastern Joseph Bonaparte Gulf of the Timor Sea. The survey was conducted under a Memorandum of Understanding between Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS) in two consecutive years 2009 (GA survey number GA-0322 and AIMS survey number SOL4934) and 2010 (GA survey number GA-0325 and AIMS survey number SOL5117). The surveys obtained detailed geological (sedimentological, geochemical, geophysical) and biological data (macro-benthic and infaunal diversity, community structure) for the banks, channels and plains to investigate relationships between the physical environment and associated biota for biodiversity prediction. The surveys also provide Arafura-Timor Sea, and wider northern Australian marine region context for the benthic biodiversity of the Van Diemen Rise. Four study areas were investigated across the outer to inner shelf. Refer to the GA record 'Methodologies for seabed substrate characterisation using multibeam bathymetry, backscatter, and video data: A case study for the Eastern Joseph Bonaparte Gulf, Northern Australia' for further information on processing techniques applied (GeoCat: 74092; GA Record: 2013/11).\n\nYou can also purchase hard copies of Geoscience Australia data and other products at http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.html

本数据集包含帝汶海东部约瑟夫·波拿巴湾范迪门海隆的海底测绘调查所得的地形位置指数（Topographic Position Index）数据。
本次调查由澳大利亚地质调查局（Geoscience Australia, GA）与澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）签署谅解备忘录共同开展，于2009年及2010年连续两年实施：2009年的调查编号为GA-0322（GA）与SOL4934（AIMS），2010年的调查编号为GA-0325（GA）与SOL5117（AIMS）。
本调查获取了浅滩、水道与平原区域的详细地质（沉积学、地球化学、地球物理）与生物学（大型底栖生物及底内生物多样性、群落结构）数据，旨在探究物理环境与相关生物群落之间的关联，以服务于生物多样性预测研究。
本次调查同时为范迪门海隆的底栖生物多样性研究提供了阿拉弗拉-帝汶海乃至更广域的澳大利亚北部海洋区域的背景数据。
本次研究覆盖了从外陆架到内陆架的四个研究区域。如需了解本次研究所用数据处理技术的详细信息，请参考澳大利亚地质调查局的公开记录《利用多波束测深（multibeam bathymetry）、反向散射（backscatter）及视频数据表征海底底质：澳大利亚北部约瑟夫·波拿巴湾东部案例研究》（GeoCat编号：74092；GA记录编号：2013/11）。

您亦可通过网址http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.html 购买澳大利亚地质调查局数据及其他产品的纸质版本。