Document Title - Geoscience Australia

Lord Howe High Resolution Grids
Topographic Data..................................................................................................................... 29
NSW LPMA.................................................................................................................... 29
GA coastline data ............................................................................................................ 29
SRTM data ...................................................................................................................... 29
Other Data ............................................................................................................................... 29
4. Data Processing ........................................................................................ 35
Swath processing...................................................................................................................... 35
Singlebeam echosounder processing........................................................................................ 35
Chart data ................................................................................................................................. 35
LADS data................................................................................................................................ 35
Satellite data processing ........................................................................................................... 35
5. Analysis and QC of Bathymetric Data .......................................................... 36
Fledermaus ............................................................................................................................... 36
ArcMap .................................................................................................................................... 36
Procedure.................................................................................................................................. 36
6. Gridding ................................................................................................... 39
Preliminary considerations....................................................................................................... 39
Gridding process ...................................................................................................................... 40
Lord Howe regional 250 m grid...................................................................................... 41
Lord Howe Island and Ball’s Pyramid plateau 100 m grid ............................................. 43
Lord Howe Island, Ball’s Pyramid and reef 40 m grid ................................................... 44
Lord Howe Island reef 8 m grid ...................................................................................... 45
7. Final Grids ................................................................................................ 47
Bibliography................................................................................................. 49
Appendix 1 ................................................................................................... 51
Multibeam systems................................................................................................................... 51
Multibeam processing .............................................................................................................. 52
Appendix 2 ................................................................................................... 54
Satellite data processing ........................................................................................................... 54
Method ............................................................................................................................ 54
Quality control ................................................................................................................ 54
Validation........................................................................................................................ 54
Appendix 3 ................................................................................................... 56
ANZLIC metadata record......................................................................................................... 56
IV