Bathymetric Grid for the region 60E to 90E, 48S to 70S

This dataset is a bathymetric grid of the region 60E to 90E and 48.45S to 70S, created in a geographic coordinate system based on a WGS84 horizontal datum. The grid has a cell size of 0.005 degrees.

Most of the work involved creating a bathymetric grid of the region 60E to 90E and 55S to 70S which was generated from the latest available multibeam swath bathymetry, fisheries' surveys and satellite altimetry data. A report outlining the development of this grid is available for download (see the related url below).

This grid was then merged with the bathymetric grid described by the metadata record 'Bathymetric Grid of Heard Island - Kerguelen Plateau Region (2005)', which covers the region 68E to 80E and 48S to 56S. Hence the final grid has two 'No data' areas between 48.45S to 55S: 60E to 68E and 80E to 90E.

The final grid is available for download as a geotiff and ArcInfo ascii file and contours derived from the grid are available for download as a shapefile (see the related urls below).

本数据集为东经60°至90°、南纬48.45°至70°区域的水深栅格（bathymetric grid），采用基于WGS84水平基准面的地理坐标系构建，栅格单元尺寸为0.005度。

本次研究的核心工作为构建东经60°至90°、南纬55°至70°区域的水深栅格，该栅格基于最新公开的多波束条带测深（multibeam swath bathymetry）数据、渔业调查数据与卫星测高（satellite altimetry）数据生成。一份阐述该栅格开发流程的研究报告可通过下方相关链接下载。

随后，将该栅格与元数据记录为"赫德岛-凯尔盖朗高原区域水深栅格（2005）"（Bathymetric Grid of Heard Island - Kerguelen Plateau Region (2005)）的水深栅格进行合并，该原始栅格的覆盖范围为东经68°至80°、南纬48°至56°。因此最终生成的栅格在南纬48.45°至55°区间存在两处无数据区域：东经60°至68°与东经80°至90°。

最终生成的栅格数据可通过GeoTIFF与ArcInfo ASCII格式下载，基于该栅格生成的等值线数据可通过Shapefile格式下载（相关链接见下方）。