Document Title - Geoscience Australia
Document Title - Geoscience Australia
Document Title - Geoscience Australia
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Lord Howe High Resolution Grids<br />
Bundesanstalt für Geowissenschaften und Rohstoffe surveys<br />
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) is the Federal Institute for <strong>Geoscience</strong>s<br />
and Natural Resources in Germany. GA holds the data for two R/V Sonne surveys undertaken in the<br />
Lord Howe region. More information on BGR can be found from the following website:<br />
http://www.bgr.bund.de/cln_101/nn_322882/EN/Home/.<br />
Sonne 7 survey data (also known as GA survey 1031)<br />
In 1978 the R/V Sonne collected bathymetric data around Lord Howe Island. These data were only<br />
acquired in deep water and have not been converted to MSL. The navigation data have been<br />
converted from WGS72 to WGS84 and was based on the transit satellite system and the positional<br />
accuracy is stated as 500 m. More information on this survey can be found in Wilcox et al. (1981).<br />
The data distribution is shown in Figure 8.<br />
Sonne 36A survey data (also known as GA survey 52)<br />
In 1985 the R/V Sonne again collected bathymetric data in the Lord Howe Island region. These data<br />
were only in deep water and have not been converted to MSL. The navigation was converted from<br />
WGS72 to WGS84; it was based on the transit satellite system with additional post-processing. The<br />
final positional accuracy is stated as 250 m. More information on this survey can be obtained from<br />
Roeser et al. (1985). The data distribution is also shown in Figure 8. From this figure, a criss-cross<br />
track near the bottom shows that some multibeam data acquisition was conducted during this survey.<br />
A request was made to BGR for access to these data; unfortunately the original field tapes have<br />
proved to be unreadable. More information on this survey can be obtained from Roeser et al. (1985).<br />
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