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 (February 2001)
ANZLIC unique identifier: ANZNS0155000053
Title: State 1:1M Stratotectonic Geology
Custodian: Department of Mineral Resources (DMR)
Jurisdiction: New South Wales
A stratotectonic map can be defined as a map that shows the pre-deformational properties and tectonic setting of rock complexes. A tectonic map is an illustration of the tectonic history of a region, of the processes of crustal evolution in time, and the origin of the architecture of the earth's crust in time. The aim of the dataset is to provide mineral explorers and other researchers with background geological information on a statewide scale. This dataset was compiled by Erwin Scheibner, Andrew Valja, and David Hayward. The dataset forms part of the State Geology Package which is available for $500, a hard copy map is also available.
- GEOSCIENCES Geology Mapping
- Geographic extent name:
- NEW SOUTH WALES - State or Territory - New South Wales
- Geographic extent polygon:
- 141 -37.5, 154 -37.5, 154 -28, 141 -28, 141 -37.5
Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate)
Geographic bounding box:
The bounding box encloses the maximum extents of the dataset. There may be voids or gaps within the bounding box, depending on the defined coverage of the dataset. Outer bounding rectangle as Latitude/Longitude coordinates based on the WGS84 datum (expressed as both Degrees Minutes Seconds and as decimal Degrees):
- North bounding latitude: 28 00 00.0 S (-28)
- South bounding latitude: 37 30 00.0 S (-37.5)
- East bounding longitude: 154 00 00.0 E (154)
- West bounding longitude: 141 00 00.0 E (141)
Lineage:
All available earth science data were used during the compilation of this dataset, these include geological maps, published (and a large amount of unpublished) papers. Concealed regions were interpreted with the help of borehole data and geophysical data.
The stratotectonic dataset was digitised using Informap and Arc/Info software by the Cartography Section of the New South Wales Department of Mineral Resources . The dataset was digitised at 1:1 million scale and can be seen to be appropriate up to 1:250 000 scale. The digitised dataset was then edited in Arc/Info and ArcView by David Hayward to create a topologically structured coverage. The Unit_id field for each polygon represents the key identifier to the coverage database.
For a full list of the references used to compile the Stratotectonic geology dataset (and the Geology of New South Wales volumes) the user should refer to the GS report (GS 1998/163).
Positional accuracy:
Boundaries on the Stratotectonic geology dataset are accurate at about the graphic scale of the map compilation at 1 : 1 million scale ie. 0.5 mm equals 0.5 km. The original data were precise to about 250m for outcrop areas. For concealed areas the accuracy decreases mainly in places where the boundary is based on geophysical data. The nature of geophysical data is such that as gradients are involved the position of dislocations depends on their dip. Where practicable second derivative data were used to improve precision. The estimate of precision for lines is about 2 km for concealed areas.
Attribute accuracy:
The dataset contains a number of attributes (see attribute definitions below), these values have been derived from a large number of sources (see data lineage). Numerous checks have been made to maintain accuracy, these checks include hardcopy plots, onscreen querying and database cross referencing. Overall accuracy of the attributes will vary according to many factors such as the date of the source maps used, or the presence of outcrop etc.
Attribute Definitions
Attribute Name Attribute Description
Lett_symb Rock letter symbol. See Additional details for a full description of the letter symbols used.
Age_desc A text description of the geological age. This geological age accords with the AGSO 'Geological Time-Scale' published in 1994.
Facies A letter symbol to represent the environment of deposition. This symbol has been uniquely defined for this package.
Facies_des A textual description of the environment of deposition. The descriptions used are consistent with standard geological conventions.
Intru_type A letter symbol to represent the type of intrusive. This symbol has been uniquely defined for this package.
Intru_desc A textual description of the type of intrusive. The package contains 17 different intrusive descriptions.
Volc_type A symbol describing the volcanic type.
Volc_desc A textual description of the volcanic unit. The package contains 20 different volcanic descriptions.
Sediments A textual description of the sediments.
Logical consistency:
As the dataset has been created in Arc/Info GIS the logical consistency is very high, i.e. all polygons are closed and labeled, and there are no duplicate lines.
Completeness:
The completeness of the dataset will vary according to the presence of rock outcrop. Rocks concealed beneath the major basins will not be as accurately mapped as the rocks that have been visually interpreted by a Geologist on the surface. All geological boundaries are labeled. All geological units are labeled.
© Copyright in this information (data) is vested in the Crown. The State of New South Wales retains ownership of the intellectual property rights.
All rights are reserved to the Crown
Limitations
The dataset has been compiled at 1:1 000 000 and can be considered to be accurate to 1:250 000 scale.
Miscellaneous
No. of Features :5574
Source Pathname : Available on CD ROM
Appl. Environment : Software - ArcView 3.0a - NT
Projection : GEOGRAPHICS
Projection Geographic
Units DD
Spheroid AUSTRALIANN
Datum AGD66
No reproduction of this information, or any part of the information is permitted in any form except as the user may be licensed to produce by the Minister for Mineral Resources for the State of New South Wales.
This dataset description complies with ANZLIC Core Metadata Guidelines Version 2 (February 2001) and XML DTD ANZMETA NSW NRIMS Page 1 v1.0 which extends ANZMETA 1.3 (metadata validation date: 2005-11-20)