Authors / CoAuthors
Geophysical Acquisition & Processing Section
Abstract
Digital Elevation data record the terrain height variations from the processed SRTM surface elevation 3 second grid data with a drape surface overlain. This National Gravity Compilation 2019 Ausdrape elevation ellipsoid image (hillshade HSI) contains the elevation of the observation surface for the 2019 Australian National Gravity Grids B series relative to the GRS80 ellipsoid (GDA94 datum). These data are used in the project No. 202008. The grid used to produce this image has a cell size of 0.00417 degrees (approximately 435m). All data (i.e., ground, airborne and marine derived from satellite altimetry) were vertically continued to this surface during processing. The surface was generated to mimic a smooth airborne survey drape surface with a minimum surface clearance of 250 m and an isotropic maximum climb and descent rates of 25 m per km. The ground surface data were derived from SRTM data with 3 second grid cell size. The data are given in units of meters.
Product Type
dataset
eCat Id
144772
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCES
- ( Data centre )
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- NCI
- ( Discipline )
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- Earth sciences
- ( Discipline )
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- geophysics
- ( Feature type )
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- image
- ( Place )
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- Australia
- ( Place )
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- None
- ( Project )
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- survey 202008
- ( Theme )
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- GADDS2.0
- ( Theme )
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- DEM
- ( Theme )
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- Elevation
- ( Theme )
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- terrain
- ( Theme )
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- digital data
- ( Theme )
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- geophysical survey
- ( Theme )
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- ellipsoid
- ( Theme )
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- airborne
- ( Theme )
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- grid
- ( Theme )
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- image
- ( Theme )
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- raster
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- Published_External
Publication Date
2020-11-09T00:00:00
Creation Date
2020-11-09T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This National Gravity Compilation 2019 Ausdrape elevation ellipsoid image (hillshade HSI) contains the elevation of the observation surface for the 2019 Australian National Gravity Grids B series (Lane et al., 2020a) relative to the GRS80 ellipsoid (GDA94 datum). These data are used in the project No. 202008. The grid used to produce this image has a cell size of 0.00417 degrees (approximately 435m). All data (i.e., ground, airborne and marine derived from satellite altimetry) were vertically continued to this surface during processing. The surface was generated to mimic a smooth airborne survey drape surface with a minimum surface clearance of 250 m and an isotropic maximum climb and descent rates of 25 m per km. The ground surface data were derived from SRTM data with 3 second grid cell size (Gallant et al., 2011; CGIAR-CSI, 2019). The data are given in units of meters. Details of the processing steps used in the generation of this surface and its relationship to the data processing can be found in Lane et al. (2020b). The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. References: CGIAR-CSI, 2019, https://cgiarcsi.community/data/srtm-90m-digital-elevation-database-v4-1/ , Accessed 18 October 2019; Gallant, J.C., Wilson, N., Dowling, T.I., Read, A.M., and Inskeep, C., 2011. SRTM-derived 3 Second Digital Elevation Models Version 1.0. Geoscience Australia, Canberra. https://pid.geoscience.gov.au/dataset/ga/72760; Lane, R. J. L., Wynne, P. E., Poudjom Djomani, Y. H., Stratford, W. R., Barretto, J. A., and Caratori Tontini, F. 2020a. 2019 Australian National Gravity Grids. Geoscience Australia, Canberra, eCat Reference Number 133023, https://pid.geoscience.gov.au/dataset/ga/133023; Lane, R. J. L., Wynne, P. E., Poudjom Djomani, Y. H., Stratford, W. R., Barretto, J. A. and Caratori Tontini, F., 2020b, 2019 Australian national gravity grids explanatory notes: Record 2020/22, Geoscience Australia, Canberra, http://dx.doi.org/10.11636/Record.2020.022
Parent Information
Geophysical Data Collection - gravity
UUID - c6b58f54-102c-19e9-e044-00144fdd4fa6,
eCat ID - 74512
Extents
[-48.0021, -7.9979, 107.9979, 164.0021]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
This National Gravity Compilation 2019 Ausdrape elevation ellipsoid image (hillshade HSI) contains the elevation of the observation surface for the 2019 Australian National Gravity Grids B series relative to the GRS80 ellipsoid (GDA94 datum).