85% coverage nth east missing 22/E55/49 Vertical scale: 150

22/E54/38 Vertical scale: 100

AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

Cape York Peninsula & Torres Strait Qld/PNG preliminary igneous & metamorphic rocks map 1:500 000

Map showing Australia's Offshore Facilities on the Northwest Shelf on a blue imagery background derived from the 2009 9 arc second bathymetric and topographic grid. Facilities data is based upon ENCOM data and includes facilities with name, oil and gas pipelines as well as gas and oil fields with name. Due to the complexity of fields, pipelines and facilities in the vicinity of Barrow Island the map has an inset at a scale of 1:120,000. For internal use only as ast 29 July 2009 Not for sale

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These images are derived from the "Magnetic Anomaly Grid of Australia" (GEOCAT record: 39154). That grid was compiled from 9 million line-kilometres of TMI data held in the National Airborne Geophysics Database. The data were collected in surveys conducted by Geoscience Australia and by airborne geophysical companies operating under contracts to Geoscience Australia and State and Territory Geological Surveys, either separately or in joint projects. Data from a number of other surveys, carried out for private companies, were acquired by Geoscience Australia. These datasets contain anomalies with wavelengths as small as 800 m.