Document Title - Geoscience Australia
Document Title - Geoscience Australia
Document Title - Geoscience Australia
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Lord Howe High Resolution Grids<br />
Digital Bathymetry Database 2 minute (DBDB2) grid<br />
The DBDB2 grid is a 2 minute of arc global bathymetry and topography data grid. It was developed<br />
by the US Naval Research Laboratory (NRL) and is based on the earlier DBDB5. Global topography<br />
from satellite altimetry and ship depth soundings were used in deep water as well as data from GA’s<br />
2002 <strong>Australia</strong>n Bathymetry and Topography grid. More information on the construction of this<br />
global grid can be found at http://www7320.nrlssc.navy.mil/DBDB2_WWW/. An extract of the<br />
model that covers the Lord Howe region is shown in Figure 2.<br />
Features of the DBDB2 model for the Lord Howe Island region are:<br />
Four seamounts are identified, in addition to the larger Lord Howe volcano.<br />
Islands in the Lord Howe Island group are incorrectly located.<br />
There is a lack of detail in the representation of the Lord Howe volcano.<br />
30.63 o S<br />
160.2 o E<br />
32.6 o S<br />
158.13 o E<br />
Figure 2: The region around Lord Howe Island as represented by the DBDB2 2 minute of arc<br />
grid (position marker approximate only).<br />
5
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