AndreaBozzo/ceres-open-data-index huggingface dataset:
Groundwater dependent ecosystems in the upper Darling River floodplain NSW, mapped using Landsat satellite data

Groundwater dependent ecosystems (GDEs) rely on access to groundwater on a permanent or intermittent basis to meet some or all of their water requirements (Richardson et al., 2011). The Tasselled Cap percentile products created by Digital Earth Australia (2023) were used to identify potential GDEs for the upper Darling River floodplain study area. These percentile products provide statistical summaries (10th, 50th, 90th percentiles) of landscape brightness, greenness and wetness in imagery acquired between 1987 and present day. The 10th percentile greenness and wetness represent the lowest 10% of values for the time period evaluated, e.g. 10th greenness represents the least green period. In arid regions, areas that are depicted as persistently green and/or wet at the 10th percentile have the greatest potential to be GDEs. For this reason, and due to accessibility of the data, the 10th percentile Tasselled Cap greenness (TCG) and Tasselled Cap wetness (TCW) products were used as the basis for the assessment of GDEs for the upper Darling River floodplain study area. 

This data release is an ESRI geodatabase, with layer files, including:

-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;original greenness and wetness datasets extracted; 

-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;classified 10th percentile greenness and wetness datasets (used as input for the combined dataset); 

-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;combined scaled 10th percentile greenness and wetness dataset (useful for a quick glance to identify potential groundwater dependent vegetation (GDV) that have high greenness and wetness e.g. river red gums)

-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;combined classified 10th percentile greenness and wetness dataset (useful to identify potential GDV/GDE and differentiate between vegetation types)

-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;coefficient of variation of 50th percentile greenness dataset (useful when used in conjunction with the scaled/combined products to help identify GDEs)

For more information and detail on these products, refer to https://dx.doi.org/10.26186/148545.

References
Digital Earth Australia (2023). Digital Earth Australia User Guide.  
Richardson, S., E. Irvine, R. Froend, P. Boon, S. Barber, and B. Bonneville. 2011a. Australian groundwater-dependent ecosystem toolbox part 1: Assessment framework. Waterlines Report 69. Canberra, Australia: Waterlines.

Tags: EFTF – Exploring for the Future, GDE, Groundwater hydrology, Landsat, NSW, New South Wales, Published_External, Tasselled Cap, Upper Darling, floodplain, groundwater dependent ecosystem, remote sensing
Organization: Geoscience Australia Data
Touga 1:50 000 topographic map

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.

Tags: 50K scale, AU-NSW, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Orford Bay 1:250 000, R502 historical topographic map

The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.

Tags: 250K scale, AU_QLD, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
Canberra Queanbeyan and Environs. Notes to accompany geological map

The Canberra and Queanbeyan 1:50,000 geological map includes all the uban area of the cities of Canberra, ACT, and Queanbeyan, NSW, and areas where planning for urban development is in progress or expected in the near future.

Tags: AU-ACT, AU-NSW, Earth Sciences, Explanatory Notes, GA Publication, Published_External, geology
Organization: Geoscience Australia Data
Report of Seismic Reflection Survey at Northparkes Mine, Central NSW

The Goonumbla district near Parkes, central NSW, is a Palaeozoic circular volcanic zone with
porphyry intrusions that have a significant exploration potential for copper-gold deposits
(Perkins et aI., 1990; Heithersayet al., 1990; Clarke and Sherwin, 1990; Hooper et al., 1996).
Aeromagnetic and gravity surveying map a large number of isolated, circular features within
this district which are associated with porphyry domes. However, the general geological
tectonic structure within which those porphyry domes were formed is still quite unknown.
Seismic profiling between some of the main porphyry locations could help constrain the
geometrical relation of those domes and map the monzonite basement structure and any fault
zones.

Tags: AU-NSW, Earth Sciences, GA Publication, Published_External, Record
Organization: Geoscience Australia Data
Castlemaine, Woodend, Nth Bacchus Marsh, Vic, 1997 VIMP Survey (GSV3071) (P663), radiometric line data, AWAGS levelled

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 This Castlemaine, Woodend, Nth Bacchus Marsh, Vic, 1997 VIMP Survey (GSV3071) (P663), radiometric line data, AWAGS levelled were acquired in 1996 by the VIC Government, and consisted of 38794 line-kilometres of data at 200m line spacing and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

Tags: AWAGS, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, Published_External, VIC, airborne digital data, gamma-ray, geophysical survey, geophysics, line, potassium, radiometrics, spectrometry, survey 663, thorium, uranium, vector
Organization: Geoscience Australia Data
Australian gravity base-station network: 1980 survey

In 1980, a gravity base-station network of 67 airports throughout Australia was surveyed with seven LaCoste and Romberg gravity meters, and tied to sites of six 1979 absolute gravity measurements. Two computer adjustments of the gravity meter observations were made, firstly with two and secondly with six absolute measurements to control scale and datum. Comparison of the adjustments shows that the absolute measurements are consistent with one another to within experimental error. The gravity values calculated in the computer adjustment using the weighted results of the six absolute sites have been adopted as the best values for the Australian National Base-station Network (lsogal 84 values). The values have a precision of 0.1 Âµm.s-2, and an accuracy of about 0.3 Âµm.s-2. A polynomial is derived for revising earlier gravity values to be consistent with the new base-station values.

Tags: Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
King Island, Tas, 2001 (WTRMP Area A) (P822), magnetic line data, AWAGS levelled

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 These line dataset from the King Island, Tas, 2001 (WTRMP Area A) survey were acquired in 2001 by the TAS Government, and consisted of 8633 line-kilometres of data at 200m line spacing and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

Tags: AWAGS, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, Published_External, TAS, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 822, vector
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sj55-12)

AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

Tags: AU, AUSGeoid98, Geodesy, Geodetic Data, Published_External, dataset, geodesy
Organization: Geoscience Australia Data
Alligator River 1:250 000, R502 historical topographic map

The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.

Tags: 250K scale, AU_NT, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
Darwin Harbour Habitat Mapping Program: Predicted standard error for interpolated surface of Calcium Carbonate in sediments

This resource contains a predicted calcium carbonate content standard error grid for the greater Darwin Harbour region as part of a baseline seabed mapping program of Darwin Harbour and Bynoe Harbour. This project was funded through offset funds provided by an INPEX-led Ichthys LNG Project to the Northern Territory Government’s Department of Environment and Natural Resources (NTG-DENR) with co-investment from Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS). The intent of this program is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps and information to underpin marine resource management decisions. The predicted calcium carbonate content standard error grid was derived from a compilation of multiple surveys undertaken by GA, AIMS and NTG-DENR between 2011 and 2017, including GA0333 (Siwabessy et al., 2015), GA0341 (Siwabessy et al., 2015), GA0351/SOL6187 (Siwabessy et al., 2016), GA4452/SOL6432 (Siwabessy et al., 2017), GA0356 (Radke et al., 2017), and GA0358 and GA0359 (Radke et al., 2018), adding to those from previous surveys GA4425 and GA0333 collected by GA, AIMS, NTG-DENR and Darwin Port Authority.

Tags: Exclusive Economic Zone, Geochemistry, Marine Environmental Baselines, Marine Survey, Published_External
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Henbury (sg53-01)

AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

Tags: AU, AUSGeoid98, Geodesy, Geodetic Data, Published_External, dataset, geodesy
Organization: Geoscience Australia Data
SA Detailed Gravity Survey 93F8 (P199363), gravity point data

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 This SA Detailed Gravity Survey 93F8 (P199363) contains a total of 3275 point data values acquired at a spacing between 500 and 1000 metres. The data is located in SA and were acquired in 1993, under project No. 199363 for BHP Group Ltd.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, SA, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 199363
Organization: Geoscience Australia Data
Kurrunng 1:100 000 unpublished topographic map

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.

Tags: 100K unpublished, AU-WA, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
Mount Florry 1:50 000 topographic map

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.

Tags: 50K scale, AU-WA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Gallipoli 1:100 000 unpublished topographic map

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.

Tags: 100K unpublished, AU-NT, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
Australia wide AFGN Absolute 2013 (P201391), gravity point data

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 This Australia wide AFGN Absolute 2013 (P201391) contains a total of 11 point data values acquired at a spacing of 750 metres. The data is located in ACT, NSW, NT, QLD, SA, TAS, VIC, WA and were acquired in 2013, under project No. 201391 for Geoscience Australia.

Tags: ACT, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, NSW, NT, Published_External, QLD, SA, TAS, VIC, WA, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 201391
Organization: Geoscience Australia Data
Levelling of multi-generational and spatially isolated geochemical surveys

Large-scale, low-density geochemical surveys, aimed at chemically characterising the near surface and providing a range of geochemical environmental data, have been undertaken around the world. In Australia, the National Geochemical Survey of Australia (NGSA) covers ~81% of the continent with a lower sample density than most other continents, reflecting the remoteness of a large proportion of the continent and the associated cost of such programs. These factors make it highly unlikely that a high-density national survey will ever occur. Fortunately, a large number of spatially constrained higher-density surface sediment geochemical surveys have been undertaken in Australia over the last 50 years. Merging these survey data with the NGSA baseline presents an opportunity not only to provide a more detailed understanding of the chemistry of the Australian continent, but also to investigate issues related to sample density, e.g. scale-related chemical variance and reliability of the national low-density data. Merging these surveys however represents a challenge into how best to level the data in order to create a seamless dataset. We have investigated the possibility of merging such disparate datasets and show that this is feasible as long as: 1) sample media and grain-size fraction are equivalent, and, 2) individual surveys are levelled to eliminate inter-laboratory differences. Levelling of geochemical data between surveys is a vital step and here we document a number of approaches we have utilised to undertake this. The results show that a variety of levelling methods (re-analysis, single standards, and multiple standards) can be used, with varying degrees of effectiveness, to create a seamless dataset, from spatially isolated surveys. We demonstrate the impact that such levelling can have on data using examples from the southern Thomson Orogen in southern Queensland and northern New South Wales, and the much larger survey from Cape York in north-eastern Australia. The levelled results show a significant improvement in the data allowing for more value to be extracted.
Citation: Philip T. Main, David C. Champion, Levelling of multi-generational and spatially isolated geochemical surveys, Journal of Geochemical Exploration, Volume 240, 2022, 107028, ISSN 0375-6742, 
https://doi.org/10.1016/j.gexplo.2022.107028.

Tags: Data levelling techniques, EARTH SCIENCES, Geochemistry, Geostatistics, Published_External, Surface geochemistry
Organization: Geoscience Australia Data
National-scale high purity silica mineral systems study

Critical minerals are the minerals and elements essential for modern technologies, economies and national security. However, the supply chains of these minerals may be vulnerable to disruption thereby making the study of these minerals, from source to product, of primary importance. 

The global transition to net-zero emissions is driving accelerated consumption of critical minerals, particularly driven by the increase in demand for technologies such as solar photovoltaics (PV) and semiconductors (Department of Industry, Science and Resources [DISR], 2022; 2023). In parallel, the phasing out of, for example, traditional machinery and manufacturing processes reliant on hydrocarbon resources (Ali et al., 2017; Bruce et al., 2021; International Energy Agency [IEA], 2021; 2023; Skirrow et al., 2013) is further adding to the global demand. High Purity Quartz (HPQ) forms just one of these critical minerals, and is the primary raw material for the production of High Purity Silica (HPS) and Silicon (Si) for use in products ranging from solar PVs to semiconductors. 

The current list of minerals classified as critical is now up to 31 (Department of Industry, Science and Resources [DISR], 2022; 2023). This diversity of critical minerals is also promoting a new focus on the exploration for i) new styles of mineralisation that might host sufficient volumes of critical minerals, and ii) a re-examination of existing minerals systems knowledge in order to help mineral explorers make new discoveries to help support the increasing demand. 

At present, the main global suppliers of HPQ are the United States, Canada, Norway, Brazil, Russia and India (Pan et al., 2022). In Australia, there has been a paucity of exploration and development of HPQ mineral deposits and, despite the potential that Australia holds for the exploration and discovery of potentially significant HPQ occurrences, Simcoa Operations Pty Ltd. (Figure 1) represents the only operator currently mining HPQ, and the only manufacturer of high purity silicon in Australia (Simcoa, 2020). 

Australia is well-positioned to incentivise the exploration, discovery and supply of raw materials, and significantly expand onshore silicon production capacity (PricewaterhouseCoopers, 2022). Research presented here highlights the opportunity that Australia has in making a positive contribution to meeting the global demand for HPQ required for high-technology applications and the transition to a net zero economy.&nbsp;

Abstract presented at the 2024 Annual Geoscience Exploration Seminar (AGES)

Tags: Australia, Australian Critical Minerals Research and Development Hub, Published_External, Resource geoscience, critical minerals, high purity quartz, high purity silica, net zero, photovoltaics, renewable energy, semiconductor, silicon
Organization: Geoscience Australia Data
Goulburn 1:50 000 topographic map

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.

Tags: 50K scale, AU-NSW, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Dorothy Hills 1:100 000 unpublished topographic map

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.

Tags: 100K unpublished, AU-WA, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data