Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

At this scale 1cm on the map represents 1km on the ground. Each map covers a minimum area of 0.5 degrees longitude by 0.5 degrees latitude or about 54 kilometres by 54 kilometres. The contour interval is 20 metres. Many maps are supplemented by hill shading. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours, localities and some administrative boundaries. Product Specifications Coverage: Australia is covered by more than 3000 x 1:100 000 scale maps, of which 1600 have been published as printed maps. Unpublished maps are available as compilations. Currency: Ranges from 1961 to 2009. Average 1997. Coordinates: Geographical and either AMG or MGA coordinates. Datum: AGD66, GDA94; AHD Projection: Universal Transverse Mercator UTM. Medium: Printed maps: Paper, flat and folded copies. Compilations: Paper or film, flat copies only.

The Polda Basin is an elongate easterly trending trough underlying the continental shelf in water depths of 50-200 m on the eastern side of the Great Australian Bight. It encompasses an area of about I0 000 km2, and contains a Proterozoic-Jurassic sedimentary fill. Although it was originally an intracratonic feature, it shows evidence of several phases of tectonism, of which the most recent culminated in the separation of Australia and Antarctica in the mid-Cretaceous. Seismic interpretation indicates that the trough contains three main depocentres. The eastern Polda Basin lies almost entirely onshore, and contains 1500-2000m of Proterozoic-Jurassic sedimentary rocks. The central Polda Basin and underlying Itiledoo Basin contain a maximum of 5000m of Proterozoic-Jurassic Gontinental sedimentary rocks, including massive halite. They are bounded to the south by a set of normal faults, and to the north by a complex faulted monocline. The western Polda Basin is apparently bounded, north and south, by relatively simple sets of east-northeasterly trending normal faults, and is interpreted to contain a mainly Mesozoic sedimentary fill. The central depocentre, in particular, has been affected by northwesterly oriented wrenching. Overall, the hydrocarbon potential of the Polda Basin is rated as low. None of the three offshore wells drilled encountered significant hydrocarbons; even so, the western depocentre is as yet untested. Potential reservoirs appear to be present, and a number of potential trapping mechanisms can be identified. Such potential traps include halite-induced anticlines, Proterozoic fault-blocks, clastic aprons adjacent to boundary faults, and unconformity traps below the Permo-Carboniferous section. Unfortunately, the existence of suitable source and seal sequences is doubtful, and the basin appears to be too immature for significant hydrocarbons to have been generated. The western Polda Basin is considered to be the most prospective, as inferred by exploration drilling elsewhere in the Great Australian Bight, which shows that Mesozoic sedimentary rocks have some hydrocarbon potential.

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

At this scale 1cm on the map represents 1km on the ground. Each map covers a minimum area of 0.5 degrees longitude by 0.5 degrees latitude or about 54 kilometres by 54 kilometres. The contour interval is 20 metres. Many maps are supplemented by hill shading. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours, localities and some administrative boundaries. Product Specifications Coverage: Australia is covered by more than 3000 x 1:100 000 scale maps, of which 1600 have been published as printed maps. Unpublished maps are available as compilations. Currency: Ranges from 1961 to 2009. Average 1997. Coordinates: Geographical and either AMG or MGA coordinates. Datum: AGD66, GDA94; AHD Projection: Universal Transverse Mercator UTM. Medium: Printed maps: Paper, flat and folded copies. Compilations: Paper or film, flat copies only.

These documents have been scanned by the GA Library. Please refer to the document for contents.

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

GDA (Geochemic al Data Analysis) is a comprehensive IBM PC-based geochemical data processing system. It is designed to use whole-rock geochemical data retrieved from the ORACLE database, but can be adapted for other databases, or data can be entered into files from the keyboard. The programs are written in FORTRAN 77 (microsoft compiler) and use the MicroGlyph Systems SciPlot graphics package for plotting. The system includes facilities for generating plots (histograms, XY plots, triangular plots, spidergrams, box-whisker plots, etc.), calculating statistical functions (e.g., mean, standard deviation, regression lines, correlation coefficients and cluster analysis) and CIPW norms, printing tables, and carrying out petrogenetic modelling calculations. Plots can be displayed on a PC screen for inspection and editing before being output to a plotter or other device. Other programs allow samples to be assigned to groups for plotting purposes, and allow editing and merging of datafiles.

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.