Gravity Gradient Strings
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SARIG Metadata
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| Acronym | air, runway | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Description | Location of airstrips, aerodromes and helicopter landing sites as point locations. Attributes give details of runway orientation, length, landing surface, category (e.g. CASA certified or registered), ownership type, lighting, status etc. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Data type | Esri File Geodatabase point feature class | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Coordinate system | GDA94 geographic | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Data sources | DTEI aviation and planning doordination, aerodrome inspection reports provided by the Local Government Association Mutual Liability Scheme, aerodrome operators/owners and other sources | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Capture scale | Various | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Maximum plot scale | Not applicable | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Date current | 2010 NOTE: some data is older than this. some of the data is not updated on a regular basis. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Capture method | GPS and onscreen digitising | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Update frequency | Annual in some cases. Much of the data is not updated on a regular basis. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Attributes |
Point attributes
Related table attributes
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| Contact |
Mike Milln | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ANZLIC metadata url | Not applicable | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Notes |
The data is the property of the Department for Transport, Energy and Infrastructure (DTEI). The data is to be used as a guide only and should not be relied upon for navigation and aircraft operations. Much of the data is not updated on a regular basis and should be verified through contact with the aerodrome owner/operator, on site inspections and other means. This data is licensed under a Creative Commons Attribution 2.5 Australian Licence (BY). |
sfgs
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SARIG Metadata
Citation
Description
Data currency
Dataset status
Access
Data quality
Contact information
Metadata information
Supplementary information
Responsible party
Description
Usage
Dataset associations
Origin
Metadata management
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Data quality
Lineage:
Source Data History: PIRSA receives seismic line location data from exploration companies as part of their statutory reporting requirements, from Government and Academic institutions and information collected by Office of Minerals and Energy Resources and its predecessors. Data is received digitally in ASCII code and UKOOA format. The data files contain surveyed and/or interpolated seismic shotpoints which define the position of the seismic line. Shotpoint locations from some of the earliest surveys recorded during the 1950s, 1960s and 1970s were not available digitally and were digitised from best available maps. Prior to 1966, the spheroid in general use was Clarke 1858. Many of the surveys from this period were digitised from existing maps and were not converted to the datum currently in use, GDA94, and may therefore be in error by up to 200 metres.
Processing Steps: Data received in digital form were checked and corrected as necessary before being committed to the database. The original shotpoint data were processed to filter out and reduce the number of points so that only those points required to define near-straight line segments are retained in the database.
Positional accuracy:
The accuracy of the surveyed data is dependant on the survey techniques used to acquire the data and the quality of the horizontal and vertical control to which the seismic shotpoints were connected. The relative accuracy between points, rather than absolute accuracy, is the main criteria in seismic surveying methodology. The absolute accuracy is defined to be within the minimum specifications of (2.5*sqrt(kilometres length of line)) metres for horizontal accuracy and (10*sqrt(kilometres length of line)) centimetres for vertical accuracy. Generally, this accuracy is a factor of 5 times better than the minimum survey specifications. The relative accuracy between points is generally better than a couple of centimetres. The data is stored in the database to 1m precision. The original data is archived in its native format including the original precision which may be quoted to two decimal places.
Attribute accuracy:
The seismic line and survey attributes are derived from operational survey reports. Validation checks are performed periodically, resulting in an estimated 95% accuracy. These checks include comparisons between reports from the spatial dataset and other supporting data.
Logical consistency:
Highly consistent internally with the exception of a small number (< 5%) of lines which are duplicated and/or have been incorrectly labelled. The majority of these are pre-1970’s lines which were digitised.
Completeness:
95% complete. Receipt of data is generally 3-6 months after a survey is completed.
Contact information
Contact organisation: Petroleum Group - Office of Minerals and Energy Resources, South Australia.
Contact position: Senior Geophysicist
Postal address: GPO Box 1671
City: Adelaide
State: South Australia
Country: Australia
Postcode: 5001
Telephone: +61 8 8463 3204
Facsimile: +61 8 8463 3229
Electronic mail address: pirsa.petroleum@sa.gov.au
Metadata information
Metadata date: 01AUG2002
Metadata reference:
Supplementary information
Refer to additional user information on our web site.
Responsible party
Responsible: Custodian / Steward
Description
Dataset classification: Derived
Spatial representation type: Vector
Feature type: Arc
Dimension: x, y
Sample graphic:
Usage
Purpose:
To display the location of and basic data for seismic lines
Use:
Geophysical and prospectivity assessment
Use limitation:
None
Dataset associations
Dependant dataset title:
None.
Attribute information:
Attribute table type: Vector - Line
- Page URL: http://www.pir.sa.gov.au/minerals/sarig/metadata/gravity_gradient_strings
- Page Last Modified: November 8, 2011