Offshore Survey Navigation Data Hydrocarbon Migration and Seepage in the Timor Sea and Browse Basin. An Integrated SAR and Geological Study GIS.

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

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Dataset citation

ANZLIC unique identifier: ANZCW0703003350

Title: Offshore Survey Navigation Data Hydrocarbon Migration and Seepage in the Timor Sea and Browse Basin. An Integrated SAR and Geological Study GIS.

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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This is the positional data of AGSO's offshore seismic surveys that fall into the area of the project. The line locations for these seismic surveys are from AGSO's Mardat Database. The surveys have been 'clipped' to the project polygon.

There are 9 surveys in the one file, they are:

100r97, 116, 119, 130, 163VTT, 165VTT, 165YST, 175BBHR and 98r

Each survey has a number of lines attached to them.

There is only one vector file:

agso_seismic.shp - Line data

ANZLIC search words:

ENERGY Petroleum Exploration
MARINE Surveys

Spatial domain:

locality map

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

Geographic extent polygon: 121 -8.7, 127.5 -8.7, 127.5 -17, 121 -17, 121 -8.7,

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

Geographic bounding box:: North bounding latitude: -8.7 °; South bounding latitude: -17 °; East bounding longitude: 127.5 °; West bounding longitude: 121 °

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Data currency

Beginning date: 2000-07-01

Ending date: 2000-11-05

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Dataset status

Progress: Complete

Maintenance and update frequency: Not Known

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Access

Stored data format:: DIGITAL - shp ArcView shape file ArcView Geographic WGS84

Available format type:: DIGITAL - shp ArcView shape file ArcView Geographic WGS84

Access constraints:

Licence required

Free Data Download

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Data quality

Lineage:

This data is recorded aboard various survey ships mostly using GPS, though sometimes Doppler positioning or Dead Reckoning. It was then processed in house using AGSO software and Intrepid software, and then stored in UKOOA format. This data was loaded into an ARCVIEW database and then converted to a shape file.

Positional accuracy:

No analysis of the positional accuracy of features has been undertaken however intuitively it is considered that 95% of all features are within 100 metres of their true position. It should be noted that positional accuracy varies greatly depending on the date of the survey. Some older survey data may not meet the above accuracy.

Attribute accuracy:

No analysis of the attribute accuracy of features has been undertaken however intuitively it is considered that attributes on all features are correct, given the objective nature of the fields and the systematic conversion method from the Mardat database.

Logical Consistency:

All lines were visually checked and there were no visible artefacts. There are no unnecessary nodes at line intersections. Checks have been carried out that lines are not duplicated, that all lines are real features and all lines are labelled.

Completeness:

All vector data and details are complete and verified.

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