Davis Coastal Seabed Mapping Survey, Antarctica (GA4301/AAS2201/HI468) - Interpreted Geomorphic Map

The Davis Coastal Seabed Mapping Survey, Antarctica (GA-4301 / AAS2201 / HI468) was conducted on the Australian Antarctic Division workboat Howard Burton during February-March 2010 as a component of Australian Antarctic Science (AAS) Project 2201 - Natural Variability and Human Induced Change on Antarctic Nearshore Marine Benthic Communities. The survey was undertaken as a collaboration between Geoscience Australia, the Australian Antarctic Division and the Australian Hydrographic Service (Royal Australian Navy). The survey acquired multibeam bathymetry and backscatter datasets from the nearshore region of the Vestfold Hills around Davis Station, Antarctica. These datasets are described by the metadata record with ID Davis_multibeam_grids.This dataset comprises an interpreted geomorphic map produced for the central survey area using multibeam bathymetry and backscatter grids and their derivatives (e.g. slope, contours). Six geomorphic units; basin, valley, embayment, pediment, bedrock outcrop and scarp were identified and mapped using definitions suitable for interpretation at the local scale (nominally 1:10 000). Polygons were created using a combination of automatic extraction and manual digitisation in ArcGIS. For further information on the geomorphic mapping methods and a description of each unit, please refer to OBrien P.E., Smith J., Stark J.S., Johnstone G., Riddle M., Franklin D. (2015) Submarine geomorphology and sea floor processes along the coast of Vestfold Hills, East Antarctica, from multibeam bathymetry and video data. Antarctic Science 27:566-586.This metadata record was created using information in Geoscience Australia's metadata record at http://www.ga.gov.au/metadata-gateway/metadata/record/89984/

南极戴维斯海岸海底测绘调查（GA-4301 / AAS2201 / HI468）于2010年2月至3月期间，依托澳大利亚南极署（Australian Antarctic Division）工作船“霍华德·伯顿号”（Howard Burton）开展，作为澳大利亚南极科学（AAS）项目2201——《南极近岸海洋底栖生物群落的自然变异与人为影响变化》的组成部分。本次调查由澳大利亚地球科学局（Geoscience Australia）、澳大利亚南极署与澳大利亚水文服务局（Australian Hydrographic Service，澳大利亚皇家海军（Royal Australian Navy））联合实施。调查采集了南极戴维斯站周边韦斯特福尔德丘陵（Vestfold Hills）近岸区域的多波束测深（multibeam bathymetry）与反向散射（backscatter）数据集，相关数据集由编号为Davis_multibeam_grids的元数据记录进行说明。本数据集包含针对调查核心区域制作的解译地貌图，该图基于多波束测深与反向散射网格数据及其衍生数据（如坡度、等高线等）生成。研究识别并绘制了6类地貌单元：盆地、河谷、海湾、山麓缓坡（pediment）、基岩露头（bedrock outcrop）与陡崖（scarp），其分类依据适配局域尺度（标称比例尺1:10000）的解译标准。地貌多边形通过ArcGIS软件结合自动提取与手动数字化的方式生成。若需了解地貌测绘方法及各单元的详细说明，请参阅文献：OBrien P.E.、Smith J.、Stark J.S.、Johnstone G.、Riddle M.、Franklin D.（2015）《基于多波束测深与视频数据的东南极洲韦斯特福尔德丘陵沿岸海底地貌与海底过程》，发表于《南极科学（Antarctic Science）》27卷，第566-586页。本元数据记录的编制参考了澳大利亚地球科学局的元数据记录，来源网址为http://www.ga.gov.au/metadata-gateway/metadata/record/89984/