Document Title - Geoscience Australia

Lord Howe High Resolution Grids
Executive Summary
Lord Howe Island lies approximately 580 km off the northern coast of New South Wales. It is a
volcanic island with a shallow (20 – 120 m) shelf; a fringing coral reef lies on its western shore.
Detailed bathymetric data are needed to better understand the marine environment. These data
provide useful insights into physical processes that act on the seabed and reveal the location of
different types of habitats, especially relict reef structures. The final bathymetric models will enable
the modelling of tsunami as these interact with the shelf, reef and the coast.
This report describes the methodology employed in creating detailed bathymetric grids of the Lord
Howe Island region. It covers data collation, quality control and gridding. Descriptions are provided
for each dataset employed, the methods used to integrate the different datasets and the attributes of
the new bathymetry models.
Four new bathymetry grids are presented, including grids that integrate bathymetry with the island’s
topography.
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