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/

南极洲戴维斯海岸海床测绘调查（GA-4301 / AAS2201 / HI468）于2010年2月至3月在澳大利亚南极分部工作船“霍华德·伯顿”号上开展，是澳大利亚南极科学（Australian Antarctic Science, AAS）项目2201——“南极近岸海洋底栖生物群落的自然变异与人类诱导变化”的组成部分。

该调查由澳大利亚地质科学局、澳大利亚南极分部与澳大利亚水文局（澳大利亚皇家海军）联合开展。

调查获取了南极洲戴维斯站周边维斯托弗德丘陵近岸区域的多波束测深（multibeam bathymetry）和反向散射数据集。这些数据集由ID为Davis_multibeam_grids的元数据记录进行描述。

本数据集包含一幅针对调查中心区域的解译地貌图，该图利用多波束测深和反向散射栅格及其衍生数据（如坡度、等高线）生成。研究人员采用适用于局部尺度（名义上为1:10000）解译的定义，识别并绘制了六种地貌单元：盆地、河谷、海湾、麓原、基岩露头和陡坡。多边形通过ArcGIS中的自动提取与手动数字化相结合的方式创建。

关于地貌制图方法及各单元的详细描述，详见OBrien P.E.、Smith J.、Stark J.S.、Johnstone G.、Riddle M.、Franklin D.（2015）发表的《基于多波束测深和视频数据的东南极洲维斯托弗德丘陵海岸海底地貌与海床过程》（Antarctic Science, 27:566-586）。

本元数据记录基于澳大利亚地质科学局元数据记录中的信息创建，其链接为：http://www.ga.gov.au/metadata-gateway/metadata/record/89984/