IN2019_V07 Bass Strait Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2019_V07 titled "RAN Hydrographic and Maritime Heritage Surveys". The voyage took place between April 11 and April 23, 2019, departing from Hobart (TAS) and arriving in Hobart (TAS).\n\nThe purpose of this voyage was to conduct an Australian Hydrographic Office Survey of Bass Strait - Completion of mapping of Sub Area A within Bass Strait and to conduct surveys of the purported site of SS Federal and opportunistic survey of five unidentified targets.\n\nThis dataset is published with the permission of CSIRO. Not to be used for navigational purposes.\n\nThe dataset contains bathymetry grids of 10m to 210m resolution of the Bass Strait produced from the processed EM122 and EM710 bathymetry data.\nLineage: Multibeam data was logged from the EM’s in Kongsberg’s proprietary *.all format and was converted to be processed within CARIS HIPS and SIPS version 10.3.1. Initial data conversion and processing was performed using the GSM python batch utility. As soon as files were copied to the processing PC (CARIS2) from the SIS acquisition machine, the data were automatically converted to the HIPS data format and merged using either zerotide (for transits & wreck surveys), predicted tides (for AHO mapping) and GPS tides (for BMR mapping) and the vessel file appropriate for either the EM122 or EM710 was applied. Once added to the HIPS project, the data was visually analysed for noise using a combination of swath and subset editing. \n\nThe data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.