Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803002240 

Victorian Spatial Data Library (VSDL) Schema

MINERALS:GRAVITY 

Jurisdiction

Victoria 

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  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2013-09-17

Date ( Publication )

2023-11-23T15:30:20

Status

Completed  

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 

Maintenance and update frequency

Irregular  

Maintenance date ( Publication )

2020-11-04T14:28:43

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

1949-01-01 

End date

2007-12-31 

Resolution

Horizontal Accuracy

25m  

Quality

Conceptual Consistency

Good 

Missing Data

Complete Completeness Verification: Metadata Custodian Review Frequency: yearly Metadata Last Reviewed by Custodian: February 2008 

Attribute Quality

Good 

Positional Accuracy

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. 

Lineage

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 

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 

Attributes

Column Name	Obligation	Unique	Data Type	Data Length	Data Precision	Data Scale	Reference Table Owner	Reference Table Name	Reference Table Code Column Name	Short Column Name	Definition
OBS_GRAV	O	N	NUMBER	22	15	4				OBS_GRAV
SURVEYID	O	N	NUMBER	22	10	0				SURVEYID
ZONE	O	N	NUMBER	22	10	0				ZONE
COMP_BA	O	N	NUMBER	22	15	4				COMP_BA
NORTHING	O	N	NUMBER	22	15	4				NORTHING
FEATCODE	O	N	VARCHAR2	7						FEATCODE
ELEV_AHD	O	N	NUMBER	22	15	4				ELEV_AHD
LATITUDE	O	N	NUMBER	22	18	6				LATITUDE
TERRCORRN	O	N	NUMBER	22	15	4				TERRCORRN
SIMPLE_BA	O	N	NUMBER	22	15	4				SIMPLE_BA
EASTING	O	N	NUMBER	22	15	4				EASTING
FREEAIR	O	N	NUMBER	22	15	4				FREEAIR
DATUM	O	N	VARCHAR2	10						DATUM
LONGITUDE	O	N	NUMBER	22	18	6				LONGITUDE
STATION_NO	O	N	NUMBER	22	10	0				STATION_NO

About the Metadata Record

Metadata identifier

urn:uuid / 1dc46388-c4ba-56fd-976f-dba4d89fce0d