Index of gravity surveys and fundamental gravity network stations (National Geoscience Dataset)

Note : This dataset description is metadata (data about data) which describes the actual dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.

---

Dataset citation

ANZLIC unique identifier: ANZCW0703003597
Title: Index of gravity surveys and fundamental gravity network stations (National Geoscience Dataset)

---

Custodian

Custodian: Geoscience Australia
Jurisdiction: Australia

---

Description

Abstract: The Gravity Survey Index presents a summary of the essential specifications on about 1000 gravity surveys held in the National Gravity Database. Gravity measurements have been made in Australia since about 1900. Organised surveys for geophysical purposes (initially oil and coal exploration) have been conducted from 1939 onwards. The dataset includes surveys carried out by AGSO (BMR), state governments, private companies, universities and other organisations. The digital point data, maps and grids derived from these surveys are available as separate products. Additional to the survey index is the locations of the the Australian fundamental gravity network stations as a separate dataset.

ANZLIC search words and qualifiers:

- GEOSCIENCES

- GEOSCIENCES Geophysics Surveys

Geographic extent name: AUSTRALIA INCLUDING EXTERNAL TERRITORIES - AUSAAT - Australia

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:

North bounding latitude: 0

South bounding latitude: -70

East bounding longitude: 165

West bounding longitude: 106

---

Data currency

Beginning date: 1939-01-01
Ending date: 2001-05-01

---

Dataset status

Progress: Complete
Maintenance and update frequency: continual

---

Access

Stored data format:

DIGITAL: RDBMS ORACLE database ORACLE

Available data format:

DIGITAL: shp ArcView shape file ArcView Geographic WGS84

DIGITAL: shp ArcView shape file ArcView Geographic GDA94

Access constraints: Free to download

---

Data quality

Lineage:
Data is extracted from an ORACLE database and generated into spatial datasets using Arcinfo.

These are information datasets giving specifications of gravity surveys and fundamental gravity network stations held in the National Gravity Database. Original data come from statistical parameters generated by the previous in-house processing system from the point dataset and information extracted from the analogue hard-copy filing system.

Positional accuracy:
Nominal Scale 1: 250,000 As some of the data is historic and/or derived from hard copy information the positional accuracy should not be relied upon below the nominal scale.

Attribute accuracy:
Variable depending on the historic and hardcopy source of some information.

Logical consistency:
A geoscientist visually inspected the finished dataset to make sure the attributes were accurate and the data were consistent spatially with current scientific information. Tests are also carried out on these data for data completeness, correct spatial representation, attribute accuracy, logical consistency and correctness, and where appropriate for compliance with Geoscience Australia's GIS data dictionary.

Completeness:
Substantially complete, the database is being continually added to and as such periodic updates will contain more complete and newer information.

---

Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia)
Acronym: GA
Position: Manager Client Services
Address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Address: GPO Box 378
Suburn: Canberra
State: ACT
Country: Australia
Postcode: 2601
Phone: 02 6249 9966
Fax: 02 6249 9960
Email: sales@ga.gov.au

---

Metadata information

Metadata date: 2001-08-01 00:00:00.0

---

Additional metadata

attributes for datasets:- Australian fundamental gravity network stations (afgnstn) feature feature type AFGN_STAT ufi unique feature identifier latitude precise latitude of station in decimal degrees longitude precise longitude of station in decimal degrees datum precise datum of station coordinates stationno unique identifier of gravity station statn_name name of station statn_type type of station Gravity Surveys (gravsrv) feature feature type GRAV_SURVEY ufi unique numeric identifier surveyid unique survey id used by Gravity group for each survey name name of the survey surveytype wether survey conducted on land, sea or air operator name of the people who wanted the survey done contractor name of the people that physically collected the data processor name of company that processed the data (If AGSO the name of the person is included) startdate start date of survey enddate end date of survey vesseltype type of vessel used to collect the data spacemin minimum space between stations spacemax maximum space between stations accuracy the accuracy of the positioning method stations the number of the stations in the survey acc_gu accuracy of the gravity values in micrometers acc_hght accuracy of the height in metres

Authors:
Mackey, T. , Kilgour, B. , Murray, A.S. , Wynne, P.

---

This report was generated on 25 May 2013.