Switched off at the request of Karen Fearn. Gallery no longer maintained or supported. This satellite image gallery shows the expansion of Australia's major towns and cities in every State and Territory since the 1980's. Residential expansion, new infrastructure (such as freeways), and changes in environmental features including reservoirs and dams can all be seen through comparison 'swipe' imagery.

Geoscience Australia, ACRES distribute Landsat Multi Spectral Scanner (MSS), Thermatic Mapper (TM) and Enhanced Thermatic Mapper Plus (ETM+) data for a series of epochs or time frames covering Australia. The first epoch is 1972. These data have been produced and provided by the Australian Greenhouse Office (AGO). AGO use the data in their National Carbon Accounting System for monitoring land clearing and revegetation. This data is only available through ACRES and ACRES Landsat Distributors, and not through the AGO. More information is available at <a href="http://www.ga.gov.au/acres/prod_ser/agosuite.jsp">http://www.ga.gov.au/acres/prod_ser/agosuite.jsp</a> This data is available in 1:1M tiles or as a full continental Mosaic. Tiles areas are available at: <a href="http://www.ga.gov.au/acres/prod_ser/agotilemap.jsp">http://www.ga.gov.au/acres/prod_ser/agotilemap.jsp</a>

The RADARSAT satellite was developed by the Canadian Space Agency (CSA) and was launched on 4 November 1995. It has a C-band, Synthetic Aperture Radar (SAR) sensor on board. The SAR is an active microwave sensor capable of imaging earth resource targets regardless of time of day, cloud, haze or smoke cover of an area. The instrument is classified "active" as it emits the energy necessary to image the earth's surface. In contrast, "passive" or "optical" sensors rely on the sun's reflected energy to image the earth. This sensor can operate in a variety of imaging modes to suit a range of applications. Depending on the beam mode, the SAR ground swath widith varies between 50 and 500 kilometres, and the pixel resolution varies between 10 and 100 metres. The sensor has HH polarisation. ACRES Radarsat archive consists of extensive coverage from August 1997 to late 1999. ACRES currently do not have an agreement with RSI but can acquire data if downlink is granted by RSI.

Geoscience Australia is distributing the Australian Geographic Reference Image (AGRI), a national mosaic which provides a spatially correct reference image at a 2.5 metre resolution across Australia. Geoscience Australia developed AGRI to address the need for a higher resolution reference image, of known accuracy, over the entire Australian continent. Geoscience Australia developed AGRI between July 2009 and June 2011. The project was made possible by a combination of new data from Japan's Advanced Land Observing Satellite (ALOS) which produced panchromatic observations at 2.5 metre resolution; new `full pass' processing techniques for rectification of satellite imagery developed in the Cooperative Research Centre for Spatial Information and included in the Barista software; Geoscience Australia's expertise in Geodesy and Global Positioning System, and the capabilities of the Australian Spatial industry in GIS database design, field survey and image processing. Pixel size: 2.5 metres for UTM Zone mosaic and 0.0001 deg (~10 m) for Australia continental mosaic. File format: Generic BIL files with ER Mapper and ENVI ASCII header for UTM Zone mosaic. ECW compressed files for both Zone mosaic and Continental mosaic. File size: UTM Zone 49 contrast balanced mosaic - 75GB UTM Zone 50 contrast balanced mosaic -296GB UTM Zone 51 contrast balanced mosaic - 376GB UTM Zone 52 contrast balanced mosaic - 354GB UTM Zone 53 contrast balanced mosaic - 381GB UTM Zone 54 contrast balanced mosaic - 472GB UTM Zone 55 contrast balanced mosaic - 474GB UTM Zone 56 contrast balanced mosaic - 377GB Continental contrast balanced mosaic - 145GB Epoch: 25/4/2010, 27/6/2010, 15/7/2010, 7/7/2007, 22/5/2007, 16/6/2010, 18/5/2010, 17/1/2010, 4/6/2010, 6/5/2010, 20/11/2009, 30/3/2007, 15/5/2007, 29/11/2006, 22/10/2009, 25/10/2010/, 19/7/2008, 8/8/2009, 21/12/2008, 8/5/2009, 10/1/2010, 23/4/2008, 11/6/2009, 16/8/2010, 28/3/2009, 10/11/2008, 30/8/2009, 14/4/2009, 25/5/2007, 1/8/2009, 13/9/2008, 29/7/2008, 5/4/2010, 3/7/2009, 10/2/2007, 7/3/2010, 22/4/2010, 22/12/2009, 3/7/2007, 8/7/2009, 18/11/2007, 23/5/2009, 12/6/2010, 28/10/2010, 14/5/2010, 14/8/2010, 28/8/2009, 15/12/2009, 2/8/2010, 19/5/2010, 19/6/2009, 1/5/2008, 3/1/2009, 31/3/2007, 18/2/2009, 26/10/2010, 24/9/2009, 26/8/2009, 15/6/2010, 17/8/2010, 3/6/2010, 2/8/2009, 22/5/2010, 8/9/2010, 22/6/2009, 24/8/2009, 29/7/2010, 30/9/2010, 17/7/2010, 15/6/2009, 2/7/2009, 19/7/2009, 20/6/2009, 22/8/2009, 11/3/2010, 13/5/2010, 9/7/2008, 1/5/2010, 30/6/2009, 20/10/2010, 3/8/2009, 8/7/2010, 25/10/2010, 8/8/2009, 10/10/2009, 30/7/2010, 13/8/2009, 30/11/2009, 16/6/2009, 5/4/2010, 23/7/2010, 6/5/2009, 23/11/2009, 9/3/2009, 29/3/2010, 16/10/2010, 2/5/2010, 29/12/2008, 18/1/2010, 22/9/2010, 9/10/2010, 23/1/2010, 27/9/2010, 29/5/2010, 30/4/2010, 2/10/2010, 19/10/2010 This data is available under Australian Creative Commons 3.0: http://creativecommons.org/licenses/by/3.0/au/ Details of the processing characteristics are available from Technical Report, GeoCat #72657

Includes copy of AGSO Record 1997/20

SPOTMaps are seamles, uniform, orthorectified territorial coverages produced with 2.5 metre colour imagery acquired by the SPOT 5 satellite. Spectral mode: Colour (3 bands) Location accuracy: 10 to 15 metres RMS, depending on the country Preprocessing level: Ortho (DEM used: Reference 3D or SRTM DTED-1 according to availability) Projection: UTM WGS 84 Format: GeoTiff

Includes copy of AGSO Record 1997/20

to follow

The AVHRR sensor collects global data on a daily basis for a variety of land, ocean, and atmospheric applications. Specific applications include forest fire detection, vegetation analysis, weather analysis and forecasting, climate research and prediction, global sea surface temperature measurements, ocean dynamics research and search and rescue. The first operational NOAA satellite (NOAA-6) was launched in 1979. This was followed by a series of additional NOAA satellites with the latest launch being NOAA-16 in September 2000. NOAA's 11, 12, 14, 15 and 16 are all still transmitting data. The AVHRR sensor is a five or six channel (depending on the model) scanner, sensing the visible, near-infrared, and thermal infrared portions of the electromagnetic spectrum. It provides global on board collection of data over a 2399 km swath. The sensor orbits the earth 14 times each day from an altitude of 833 km. ACRES keeps a 7 day old rolling archive which is available free to registered users. Acquisitions older than 7 days are archived by CSIRO Earth Observation Centre.

Archive only - various islands and reefs