This is a national seamless data product aimed at regional or national applications. TOPO 2.5M 1998 contains a small scale vector representation of the topographic mapping features of Australia. The data include the following themes: Hydrography - drainage networks including rivers, lakes and offshore features; and Infrastructure - roads, railways, localities and built-up areas. Data was primarily sourced from Geoscience Australia`s GEODATA TOPO-250K data set however all features were revised in 1998. Free online and CD-ROM (fee applies).

The 1:2.5M scale geology of Australia data documents the distribution and age of major stratigraphic, intrusive and medium to high-grade metamorphic rock units of onshore Australia. This edition contains the same geological content as the previous edition, but is structured according to Geoscience Australia's 2010 data standards and is provided in additional digital formats. The dataset was compiled to use at scales between 1:2.5 million and 1:5 million inclusive. The units distinguished/mapped mainly represent stratigraphic supergroups, regional intrusive associations and regional metamorphic complexes. Groupings of Precambrian units in the time-space diagram are generally separated by major time breaks; Phanerozoic units are grouped according to stratigraphic age i.e. System/Period. The time-space diagram has the added benefit that it provides a summary of units currently included on the themes. The method used to distinguish sedimentary and many volcanic units varies for each geological eon as follows: <ul><li>Cainozoic units are morphological units which emphasise the relationship of the sedimentary fill to the landscape.</li> <li>Mesozoic units are regionally extensive to continent-wide time-rock units which emphasise the System of Period(s).</li> <li>Palaeozoic units are stratotectonic units that emphasise either the dominant System or Period(s) or the range of Periods.</li> <li>Proterozoic units are commonly regional stratotectonic units - separated by major time breaks and split into the Palaeoproterozoic, Mesoproterozoic and Neoproterozoic Eras - which are generally unique to each cratonic region.</li> <li>Archaean units are regional lithological units grouped into broad time divisions.</li> <li>Metamorphic units are lithological units which emphasise the metamorphic facies and timing of the last major metamorphic event. </li> <li>Igneous units are regional units which emphasise the dominant lithology and are grouped into broad time divisions.</li></ul>

Background Explorer is a Geoscience Australia (GA) application, which was sponsored by the Department of Industry (DoI), commencing in 2012. Explorer is a comprehensive and powerful modern web-based decision support tool utilising high quality data products to aid information discovery, visualisation and the modelling of planning and development scenarios using the best available data. Originally developed as a pipeline planning decision support system, Explorer continues to break new ground providing visualisation and decision support for a disparate-range of infrastructure, planning and modelling needs, across government and industry alike. Relevance Explorer provides the ability for government planners, regulators, investors and industry proponents to drill down into specific areas and analyse location information about the geography, infrastructure, geology, resources and the investment potential of Australia. Explorer currently utilises modelling techniques such as multi-criteria analysis for: 1) least cost path route selection and assessment for major infrastructure such as pipelines, roads, rail and transmission lines; and 2) can be further enhanced to identify and assess critical infrastructure location options for infrastructure such as, power stations, airports, ports, renewable energy facilities and water catchment reservoirs. First-pass planning & analysis and delivery of investment opportunities information Explorer brings national and local scale data together from multiple sources with a powerful visualisation capability, in an intuitive interface. Originally designed to provide linear infrastructure first-pass planning, Explorer has been successfully adapted to provide capabilities for investment opportunity analysis, including; economic fairways modelling, offshore marine and fisheries decision support, infrastructure planning and natural hazards modelling. What if analysis The tools provided by Explorer allow the creation of optimal routes or locations for future infrastructure what if modelling tasks, taking into account factors such as terrain, geology, land use restrictions and natural hazards such as flood and earthquake zones. The what-if modelling functionality can be equally applied to future development and investment planning tasks, using appropriate data to provide an overview of the proposed development and investment potential of a geographic region or defined area. Evidenced-based Modelling outputs and planning scenarios are supported by decision support documentation, automatically generated by Explorer. Data provenance including metadata records are provided as evidence of the data and modelling algorithms used, giving complete transparency to the modelling task. Collaborative platform Explorer provides a collaborative workspace, enabling users to create secure projects, where access can be limited to those individuals selected by the project initiator. Future capabilities will allow the saving of sessions within the project workspace. Secure data Explorer is a secure platform allowing users to access predefined data layers and their own data for modelling and assessment purposes. Restricted datasets and modelling outputs are stored securely and access locked down to authorised users only.

Northern Territory Stratigraphy map 1:2.5m

Northern Territory of Australia Mineral deposits map 1:2.5 million

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Geoscience Australia's wall map of Australia is ideal for displays and feature walls in offices, classrooms and conference rooms. The four component sheets - North-East, North-West, South-East and South-West are available individually, with each map 103cm x 88cm. The fully assembled size is 2m x 1.7m. At this scale 1cm on the map represents 25km on the ground. Product Specifications Coverage: Complete coverage of Australia Currency: Last revised 2011 Coordinates: Geographical Datum: AGD66 (GDA94 compliant at this scale); AHD Projection: Simple Conic on two standard parallels (18S and 36S)

Geoscience Australia`s wall map of Australia is ideal for displays and feature walls in offices, classrooms and conference rooms. The four component sheets - North-East, North-West, South-East and South-West are available individually, flat or folded, with each map 103cm x 88cm. The fully assembled size is 2m x 1.7m. At this scale 1cm on the map represents 25km on the ground. This map can be purchased from Geoscience Australia`s Sales Centre or your nearest topographic map retailer. Digital data at this scale, suitable for use in a GIS, is also available for free download. Product Specifications Coverage: Complete coverage of Australia Currency: Last revised 1998 Coordinates: Geographical Datum: AGD66 (GDA94 compliant at this scale); AHD Projection: Simple Conic on two standard parallels (18S and 36S) Medium: Paper, flat and folded copies Forward Program: Will be revised upon completion of small-scale product data revision

Geoscience Australia`s wall map of Australia is ideal for displays and feature walls in offices, classrooms and conference rooms. The four component sheets - North-East, North-West, South-East and South-West are available individually, flat or folded, with each map 103cm x 88cm. The fully assembled size is 2m x 1.7m. At this scale 1 cm on the map represents 25km on the ground. This map can be purchased from Geoscience Australia`s Sales Centre or your nearest topographic map retailer. Digital data at this scale, suitable for use in a GIS, is also available for free download. Product Specifications Coverage: Complete coverage of Australia Currency: Last revised 1998 Coordinates: Geographical Datum: AGD66 (GDA94 compliant at this scale); AHD Projection: Simple Conic on two standard parallels (18S and 36S) Medium: Paper, flat and folded copies Forward Program: Will be revised upon completion of small-scale product data revision

Geoscience Australia`s wall map of Australia is ideal for displays and feature walls in offices, classrooms and conference rooms. The four component sheets - North-East, North-West, South-East and South-West are available individually, flat or folded, with each map 103cm x 88cm. The fully assembled size is 2m x 1.7m. At this scale 1 cm on the map represents 25km on the ground. This map can be purchased from Geoscience Australia`s Sales Centre or your nearest topographic map retailer. Digital data at this scale, suitable for use in a GIS, is also available for free download. Product Specifications Coverage: Complete coverage of Australia Currency: Last revised 1998 Coordinates: Geographical Datum: AGD66 (GDA94 compliant at this scale); AHD Projection: Simple Conic on two standard parallels (18S and 36S) Medium: Paper, flat and folded copies Forward Program: Will be revised upon completion of small-scale product data revision