NEXIS (National Exposure Information System) Residential Dwelling Density is a set of four raster layers representing the density of residential dwellings across Australia at different scales and resolutions. Resolutions include 2km, 1km, 500m and 100m. The Australian Bureau of Statistics (ABS) defines dwelling units as self-contained suites of rooms including cooking and bathing facilities and intended for long-term residential use. Such dwelling units include houses-detached buildings used for long-term residential purposes-and other dwellings including flats. This product is based on NEXIS version 13 (2022) data.

This service represents operational bushfire boundaries updated on a 15 minute interval throughout the 2021/22 bushfire season (1/9/2021 - 30/4/2022) for all Australian jurisdictions who have the technical ability and/or appropriate licence conditions to provide this information. The accuracy and completeness of the data attributes within this webservice is reliant on each jurisdictional source and the information they elect to publish into their operational bushfire boundary data products. The update frequency of the underlying data varies across the jurisdictions and therefore data may not be present in some areas. No filtering has been performed where source data overlaps.

NEXIS (National Exposure Information System) Residential Dwelling Density web service is a set of four raster layers representing the density of residential dwellings across Australia at different scales and resolutions.

NEXIS (National Exposure Information System) Residential Dwelling Density web service is a set of four raster layers representing the density of residential dwellings across Australia at different scales and resolutions.

<div>Knowledge of the nature of buildings within CBD areas is fundamental to a broad range of decision making processes, including planning, emergency management and the mitigation of the impact of natural hazards. To support these activities, Geoscience Australia has developed a building information system called the National Exposure Information System (NEXIS) which provides information on buildings across Australia. Most of the building level information in NEXIS is statistically derived, but efforts are being made to include more detailed information on the nature of individual buildings, particularly in CBD areas. This is being achieved in Melbourne through field survey work.</div>

The Australian National Exposure Information System (NEXIS) collates the best publicly-available information, statistics, spatial and survey data into comprehensive and nationally-consistent exposure information datasets. Where data is limited, models are used to apply statistics based on similar areas. Exposure Information products are created at the national, state or local level to understand the elements at risk during an event or as a key input for analysis in risk assessments. <b>Value: </b>NEXIS products are not intended for operational purposes at the building or individual feature level. Its strength is to provide consistent aggregated exposure information for individual event footprints or at standard community, local, state and national geographies such as the Australian Bureau of Statistics (ABS) Statistical Areas (SA) or Local Government Areas (LGA). <b>Scope: </b>National detailed exposure information of the number of people, dwellings, other buildings and structures, businesses, agricultural and environmental assets. Further information can be found at the following URL: https://www.ga.gov.au/scientific-topics/community-safety/risk-and-impact/nexis

<div>Knowledge of the nature of buildings within CBD areas is fundamental to a broad range of decision making processes, including planning, emergency management and the mitigation of the impact of natural hazards. To support these activities, Geoscience Australia has developed a building information system called the National Exposure Information System (NEXIS) which provides information on buildings across Australia. Most of the building level information in NEXIS is statistically derived, but efforts are being made to include more detailed information on the nature of individual buildings, particularly in CBD areas. This is being achieved in Sydney through field survey work.</div>

In August 2002 the Council of Australian Governments (COAG) reviewed natural disaster relief and mitigation arrangements for Australia (COAG, 2003). In response to the recommendation to “develop and implement a five-year national program of systematic and rigorous disaster risk assessments”, Geoscience Australia (GA) is undertaking a series of national risk assessments for a range of natural hazards. Fundamental to any risk assessment is an understanding of the exposure including the number and type of buildings, businesses, infrastructure and people exposed to the hazard of interest. Presently there is no nationally consistent exposure database in existence for risk assessment purposes. It is important to emphasise that understanding the risks associated with various hazards requires more detailed information than the population and number of structures at a census district level. The understanding of building type, construction (roof and wall) type, building age, number of storeys, business type and replacement value is critical to understanding the potential impact on Australian communities from various hazards. The National Exposure Information System (NEXIS) is aimed at providing nationally consistent and best available exposure information at the building level. It requires detailed spatial analysis and integration of available demographic, structural and statistical data. Fundamentally, this system is developed from several national spatial datasets as a generic approach with several assumptions made to derive meaningful information. NEXIS underpins scenarios and risk assessments for various hazards. Included are earthquakes, cyclones, severe synoptic wind, tsunami, flood and technogenic critical infrastructure failure. It will be integrated with early warning and alert systems to provide real time assessment of damage or forecast the impact for any plausible hazards. This system is intended to provide a relative assessment of exposure from multiple hazards and provide the geographic distribution of exposure for regional planning. This will be at an aggregated census district level now and at a mesh block level in the future. The system is scoped to capture the residential, business (commercial and industrial), and ancillary (educational, government, community, religious, etc.) infrastructure. Currently the NEXIS architecture is finalised and the system provides residential exposure information. The prototype for business exposure is in progress. The system aims to capture ancillary buildings, infrastructure and various critical infrastructure sector exposures in future. More specific building and socio-economic information will be incorporated as new datasets or sources of information become available. The NEXIS will be able to provide the exposure information for the impact analysis for a region. This database will not support a site specific assessment involving one or two buildings and need more specific information about the particular exposure to estimate the risk at micro level. More detailed information suitable for such analysis will be maintained in reference databases.

This dataset presents a three hourly accumulation of bushfire boundaries throughout the 2021/22 bushfire season (1/9/2021 - 30/4/22) for all Australian jurisdictions who have the technical ability and/or appropriate licence conditions to provide this information. The accuracy and completeness of the data attributes within this webservice is reliant on each jurisdictional source and the information they elect to publish into their historical bushfire boundary data products. The update frequency of the underlying data varies across the jurisdictions and therefore data may not be present in some areas. No filtering has been performed where source data overlaps.

NEXIS (National Exposure Information System) Residential Dwelling Density web service is a set of four raster layers representing the density of residential dwellings across Australia at different scales and resolutions.