National Gravity Compilation 2019 Ausdrape elevation geoid grid  


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 geoid grid is elevation data for the 2019 Australian National Gravity Grids B series. These data are used in the project No. 202008. The grid 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. The data are given in units of meters.

Product Type

dataset

eCat Id

144793

Contact for the resource

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Data centre )
  • NCI
( Discipline )
  • Earth sciences
( Discipline )
  • geophysics
( Feature type )
  • grid
( Place )
  • Australia
( Place )
  • None
( Project )
  • survey 202008
( Theme )
  • GADDS2.0
( Theme )
  • DEM
( Theme )
  • Elevation
( Theme )
  • terrain
( Theme )
  • digital data
( Theme )
  • Ausdrape
( Theme )
  • geophysical survey
( Theme )
  • geoid
( Theme )
  • airborne
( Theme )
  • grid
( Theme )
  • raster
  • Published_External

Publication Date

2020-10-31T00:00:00

Creation Date

2020-10-31T00:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

This National Gravity Compilation 2019 Ausdrape elevation geoid grid contains the elevation data for the 2019 Australian National Gravity Grids B series (Lane et al., 2020a) relative to the geoid vertical datum. These data are used in the project No. 202008. The grid 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., 2020, 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

Association Type - operatedOnBy

National Gravity Compilation 2019 Ausdrape elevation geoid grid NCSS    

Association Type - operatedOnBy

National Gravity Compilation 2019 Ausdrape elevation geoid grid OPeNDAP    

Association Type - operatedOnBy

National Gravity Compilation 2019 Ausdrape elevation geoid grid WMS    

Association Type - operatedOnBy

National Gravity Compilation 2019 Ausdrape elevation geoid grid WCS    

Downloads and Links

File available for download in various formats from the GADDS2 portal  

National Gravity Compilation 2019 Ausdrape elevation geoid grid file download  

National Gravity Compilation 2019 Ausdrape elevation geoid grid NCSS  

National Gravity Compilation 2019 Ausdrape elevation geoid grid OPeNDAP  

National Gravity Compilation 2019 Ausdrape elevation geoid grid WMS  

National Gravity Compilation 2019 Ausdrape elevation geoid grid WCS  

Source Information

This National Gravity Compilation 2019 Ausdrape elevation geoid grid contains the elevation of the observation surface for the 2019 Australian National Gravity Grids B series relative to the geoid vertical datum.