This product is no longer available.

No abstract available

This product is no longer available.

No abstract available

Australia marine surveys base map

No abstract available

No abstract available

No abstract available

This has been superceded by GeoCat 71670

bathymetric grid of the Heard Island-Kerguelen Plateau Region (Longitudes 68 E - 80 E, Latitudes 48 S - 56 S) is produced. In doing so, the individual datasets used have been closely examined and any deficiencies noted for further follow up or have been rectified immediately and the changes documented. These datasets include modern multibeam data, coastline data obtained from the World Vector Shoreline, echosounder data from research, fishing and Customs vessels and satellite derived bathymetric data. A hierarchical system was employed whereby the best and most extensive datasets were gridded first and applied as a mask to the next best dataset. A new masking grid would be formed from these datasets to pass non-overlapping data in the next best dataset. This procedure was employed until finally the satellite data were masked. All the various levels of masked data were then brought together by the gridding algorithm (Intrepid Desmond Fitzgerald Associates) and an ERMapper format grid produced. A grid cell size of 0.005? (nominal 500m) was used with many iterations of minimum curvature gridding and several passes of smoothing. The final grid is available in ERMapper, ArcInfo and ASCII xyz formats.