Grid Images - Seal Thickness 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: ANZCW0703003371

Title: Grid Images - Seal Thickness 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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Description

Abstract:

These images are the thickness of certain geological times - 95 to 115 million years

115 to 135 million years

The data was derived from no less than 100 wells in the Northwest Shelf Region.

These image files show the thickness of two seperate seals.

The history of the data that was originally in an AGSO database is unknown, for the data is too wide spread over a large geographical area.

All the data is in raster format and the original data came in metres.

ANZLIC search words:

ENERGY Petroleum Exploration
GEOSCIENCES Mapping
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 - tiff Tagged Image File Format (TIFF) Geographic WGS84

Available format type:: DIGITAL - tiff Tagged Image File Format (TIFF) WGS84

Access constraints:

Licence required

Free Data Download

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An export from AGSO's PEDIN database of the thickness between the two stages gave the original data in EXCEL format. This data was then imported into Petrosys where the final grids were made. Once the grids were finalised in Petrosys, they were then exported into ERMAPPER. Where there were converted into a format that ARCVIEW could read, BIL files. In ERMAPPER the grids where modified only by there colour spread. The colour table used for all grids was, 'rainbow_reversed'.

No interpretation was done to the data.

This represents the depth in metres. They can only be used for general usage, for they have no data attached to them, they are only georeferenced images.

Positional accuracy:

Because the data come from well information, the datum of the wells is unknown, so the data should only be represented at a scale greater than 1:1000000. Any lower than that might distort the accuracy levels.

All the raster images have a cell size of 20m. After the georeferencing of the images in ERMAPPER a positional accuracy can be 'estimated' within 50m. Each raster TIFF file has a 'tfw' file (tiff world file). This is used to georeference the raster image.

Attribute accuracy:

The raster data has no attributes, just the file names. They can only be used for general usage, for they have no data attached to them, they are only georeferenced images.

Logical Consistency:

All raster data has been visually checked for extraneous points and value added data.

Completeness:

All raster data and details are complete and verified.

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