The Australian Maritime Boundaries Web Service is a web based interactive mapping and decision support system that improves access to integrated government and non-government information in the Australian Marine Jurisdiction. The Australian Maritime Boundaries Web Service contains many layers of information displayed in themes of Maritime Boundaries. The data has been sourced from Geoscience Australia, other Australian government agencies and some industry sources. Information in this application should not be relied upon as the sole source of information for commercial and operational decisions. The Australian Maritime Boundaries Web Service should not be used for navigational purposes.

The source data for this dataset is the draft version of the Dynamic Land Cover Map based on MODIS Data, obtained from Geoscience Australia. The Dynamic Land Cover Map presents land cover information for every 250m by 250m area of the country from April 2000 to April 2008. The classification scheme used to describe land cover categories in the Dynamic Land Cover Map conforms to the 2007 International Standards Organisation (ISO) land cover standard (19144-2). The Dynamic Land Cover Map shows Australian land covers clustered into 34 ISO classes. These reflect the structural character of vegetation, ranging from cultivated and managed land covers (crops and pastures) to natural land covers such as closed forest and sparse, open grasslands. This dataset was reclassified into Annuals, Perennials, Water Bodies and Urban Areas. Annuals - Extraction Sites, Bare Areas, Rainfed Cropping, Irrigated Cropping and Irrigated Pasture and Rainfed Pasture Perennials - Wetlands, Forbs (open and closed), Tussock, Alpine and Hummock Grasses (Open, Closed and sparse), Shrubs (open and closed), Rainfed Sugar Irrigated Sugar and Trees (Open, closed, scattered and sparse) Water Bodies - Inland Waterbodies and Salt Lakes To obtain urban areas, the dataset was unioned with the 250k topographic map series obtained from Geoscience Australia.

These datasets are intended to be used with the National Geoscience Datasets as reference graticules with coding of latitude and longitudinal positions.

The Geology of Australia dataset documents the distribution and age of major stratigraphic, intrusive and medium to high-grade metamorphic rock units of onshore Australia. The data set was compiled to use at the 1:5,000,000 scale. The units distinguished/mapped mainly represent stratigraphic supergroups, regional intrusive associations and regional metamorphic complexes. This dataset is a generalised version of the 1:2,500,000 scale Geology (GEOMET No. 2305).

Determination of an accurate groundwater balance for a region requires estimation of recharge and discharge rates and, where possible, knowledge of their spatial distribution. Where the value of the resource warrants it, detailed recharge and discharge studies are commissioned. These studies provide comprehensive empirical information on spatial and temporal variability of recharge, and the relationship between recharge rates and soil, regolith, landform and vegetation parameters. Where the value of the resource does not warrant detailed research, much cruder approaches (such as the estimation of recharge as a simple percentage of rainfall or the assumption that discharge is non-existent) are used. The CSIRO-led Recharge Discharge Mapping in Data Poor Areas Project jointly undertaken with Geoscience Australia (GA) developed a nationally consistent approach to recharge and discharge estimation for data poor areas which provide an intermediate solution between the use of simple approximations and the results of detailed field and modelling studies. Initially made available via GA's MapConnect website, the data layers in this dataset provide the means for hydrologists to populate the Recharge Estimation spreadsheet and the Discharge Estimation spreadsheet which may be sourced from CSIRO.

Geoscience Australia has been updating its collection of navigation for marine seismic surveys in Australia. These include original navigation files, the 2003 SNIP navigation files and digitised survey track maps. The result will be an updated cleansed navigation collection. The collection is based on the SNIP format P190 navigation file which follows the UKOOA standard. Industry standard metadata associated with a seismic survey is preserved. To assist industry, Geoscience Australia is making available its updated version of cleansed navigation. Although the process of updating the navigation data is ongoing and there is still legacy data to check, the navigation data is at a point where a significant improvement has been achieved and it is now usable. Users should be aware that this navigation is not final and there may be errors. Geoscience Australia (email - AusGeodata@ga.gov.au) appreciates being notified of any errors found. The data is available in both KML and Shape file formats. The KML file can be viewed using a range of applications including Google Earth, NASA WorldWind, ESRI ArcGIS Explorer, Adobe PhotoShop, AutoCAD3D or any other earth browser (geobrowser) that accepts KML formatted data. Alternatively the Shape files can be downloaded and viewed using any application that supports shape files. Disclaimer: Geoscience Australia gives no warranty regarding the data downloads provided herein nor the data's accuracy, completeness, currency or suitability for any particular purpose. Geoscience Australia disclaims all other liability for all loss, damages, expense and costs incurred by any person as a result of relying on the information in the data downloads.

This dataset is a spatial representation of the Geoscience Australia Earthquake Database. The dataset contains recorded magnitudes for earthquakes on and near Australia. Local events of magnitude 4 and above and regional events of magnitude 6 and above are displayed.

These data represent the January 2002 edition of the Magnetic Anomaly Grid of the Australian Region. This version is the first integrated onshore/offshore magnetic anomaly grid for the complete Australian margin extending across 8S - 52S, 106E - 172E. The grid cell size is 0.01 degree (approx. 1 km). Earlier releases were restricted to portions of NW and SW Australia. - Magnetic anomaly unit is nanoTesla (nT). Appropriate IGRFs have been removed. Horizontal datum is GDA94 (which is equivalent to WGS84). - The marine data were levelled independently of the onshore data in three sectors (see below). The NNW and SSW sectors were released as grids previously. The eastern sector was levelled in 2000 in collaboration with Intrepid Geophysics (Melbourne, Australia). The three levelled sectors, together with the unlevelled sectors were combined with the onshore grid to give the present grid. Altogether, 3,022,656 data points are in the database from which the marine grid was created. - Unlevelled sectors: (-8 -25 160 172), (-39 -52 156 172), (-46 -52 106 140) - Levelled sectors: (-37 -52 140 156), (-25 -39 143 172), (-8 -25 143 160), (-24 -46 106 140), (-8 -24 106 143) - There are several places at the join between onshore and offshore grids where the two grids do not match. The problem exists because the onshore grid was developed earlier, and there was poor control on the grid merging process at the margins. Future work will attempt to address this issue and improve the continuity between the onshore and offshore grids.

ArcGIS shapefile detailing GA's multibeam bathymetry holdings and coverage.

This dataset is the mean annual surface evaporation between 1981 and 2006 and estimates potential evaporation using a variety of methods as as well as intermediary datasets. The main intermediary datasets relate to surface radiation but also include windspeed, vapour pressure deficit and air temperature. In addition, two 'reference datasets' are included: FAO56 crop reference evapotranspiration (Allen et al., 1998) and 'PenPan' evaporation (Rotstayn et al. 2006), which is synthetic US Class A pan evaporation. The source data (maximum and minimum air temperature, vapour pressure) are not available through this website (see Jones et al. (2009) for access). Each dataset describes a specific variable for a specific time-step. That is, data are supplied as daily values as well as monthly and annual aggregates/averages. Long-term (1981-2006) annual averages are also provided. Specifics on the source data and the formulations used to generate each variable are outlined fully in Donohue et al. (2009). CSIRO Land and Water is the custodian of this dataset and it can be downloaded from http://www-data.wron.csiro.au/ts/climate/evaporation/donahue For full metadata, can acquire it at the above website or can see the publications: Donohue R. J., McVicar T. R. & Roderick M. L. (2010) Assessing the ability of potential evaporation formulations to capture the dynamics in evaporative demand within a changing climate. Journal of Hydrology, 386, 186-197, doi:10.1016/j.jhydrol.2010.03.020 or Donohue R. J., McVicar T. R. & Roderick M. L. (2009) Generating Australian potential evaporation data suitable for assessing the dynamics in evaporative demand within a changing climate. CSIRO: Water for a Healthy Country National Research Flagship, Canberra. http://www.clw.csiro.au/publications/waterforahealthycountry/2009/wfhc-evaporative-demand-dynamics.pdf for more information.