Gravity Reading Locations and Measurement

dataset: GRAVITY
Measurements of the Earth's gravitational field have been taken at these locations. Gravity Readings differ depending upon density of rock. This can be an indication of rock types.
 
Citation proposal Citation proposal
(2013)

Gravity Reading Locations and Measurement

Department of Energy, Environment and Climate Action
 

Description

Title
Gravity Reading Locations and Measurement 
Alternate title
GRAVITY 
Resource Type
Dataset  
Supplemental Information
History: Gravity data collected dominantly on roads/tracks etc., Elevation data associated with gravity readings collected using various technics (traditional surveying, barometers, GPS, etc.) Related Documents: None 
Status
Completed  
 
 

Temporal

Time period
1949-01-012007-12-31 
 
 

Spatial

Spatial representation type
Vector  
Horizontal Accuracy
25m  
Code
4283 


 

 

Maintenance

Maintenance and update frequency
Irregular  
 
 

Format

 
 

Contacts

  Point of contact

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.
 
 

Keywords

Topic category
  • Geoscientific information
 
 

Resource Constraints

Use limitation
The data are available free of charge from DPI's Minerals and Petroleum Online Store at www.dpi.vic.gov.au/minpet/store and from the "Geoscience Portal" at www.geoscience.gov.au through the Geophysical Archive Data Delivery System (GADDS). The data is subject to Crown Copyright and interested parties are required to enter into a licence agreement that can be obtained from the custodian. Subject to licence conditions 
Classification
Unclassified  
 
 

Lineage

Statement
Dataset Source: The dataset is compiled from data acquired by GeoScience Victoria (GSV), Geoscience Australia (GA) and private companies from 1949 to 2007. Station spacings vary from 11 km to 10 m. The position data are based on the GDA94 datum for horizontal coordinates and the AHD for vertical coordinates. The gravity data are based on the IGSN71 datum and gravity units are micrometres per second squared. Simple and complete Bouguer anomaly values have been calculated using a density of 2.67 g/cc. A NULL value of 99999 has been used for fields where terrain corrected data is not currently available. Each gravity survey has a unique survey identifier (surveyid). Additional metadata for individual gravity surveys is available from the Index of Gravity Surveys maintained by Geoscience Australia. Dataset Originality: Derived 
Description
Collection Method: Various 
Description
file copied to /arc/p_mpv/import/geophys/vicgrav_located_data_28_11_02_db.dat then in mpv arcinfo project import_gravity2mpvcgdl is run to generate the points and copy them to /cdb_mpv/l100-gmpv areas 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Comments
Good 
Positional Accuracy
Comments
Highly variable, ranges from 100's m horizontal error with 10's m vertical error for early surveys where positions were taken from base maps with vertical positions from analogue barometers, to millimetre accuracy for horizontal and vertical positions using post-processed differential GPS and modern surveying methods. 
Conceptual Consistency
Comments
Good 
Missing Data
Comments
Complete Completeness Verification: Metadata Custodian Review Frequency: yearly Metadata Last Reviewed by Custodian: February 2008 
Excess Data
 
 

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