Dams and Water Storages 1990

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: ANZCW0703005382

Title: Dams and Water Storages 1990

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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Description

Abstract:

Dams and Water Storages 1990 shows point location and other non-locational information of large reservoirs in Australia owned by a public authority. Attribute information includes:

- Name of the dam wall and associated water body;

- Name of the stream on which it is located;

- Storage capacity and surface area of the water body;

- Ownership; and

- Construction details of the dam wall.

ANZLIC search words:

WATER Supply Mapping

Spatial domain:

locality map

Geographic extent polygon: 110 -5, 160 -5, 160 -44, 110 -44, 110 -5,

Geographic bounding box:: North bounding latitude: -5 °; South bounding latitude: -44 °; East bounding longitude: 160 °; West bounding longitude: 110 °

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Data currency

Beginning date: Not Known

Ending date: 1989-12-01

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Dataset status

Progress: Complete

Maintenance and update frequency: Not Known

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Access

Stored data format:: DIGITAL - e00 ArcInfo export (e00) ArcInfo Workstation Geographic GDA94

Available format type:: DIGITAL - mif MapInfo Interchange Format (MIF) MapInfo Geographic GDA94; DIGITAL - e00 ArcInfo export (e00) ArcInfo Workstation Geographic GDA94; DIGITAL - shp ArcView shape file ArcView Geographic GDA94

Access constraints:

The data are subject to Copyright. Data files may be downloaded from Geoscience Australia's website at www.ga.gov.au/download/. A licence agreement is required.

Free Data Download

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Data quality

Lineage:

Data have been gathered from a variety of sources including:

- State water authorities and other agencies' registers of dams;

- Geoscience Australia's 1:100 000 and 1:250 000 topographic maps;

- Various larger scale specialist maps and plans;

- Annual Reports; and

- Numerous private industry publications including journals and newspapers.

Combining information gleaned from all the above sources, the latitude/longitude of each was calculated and added directly into the database. Depending on the detail of the source information, the calculated value was to the nearest minute at worst and second at best.

Positional accuracy:

The positional accuracy of any database is dependant on the accuracy of the source material and the particular data capture procedures used. Because the database has had the locational information manually entered, the positional accuracy is fully dependant on the source material.

in general, no more than 10% of well defined points are in error by more than 0.5mm when measured on the source material. To test this, verification plots were produced from the data at 1:1 million scale and then overlaid on 1:1 million World Aeronautical Charts.

Attribute accuracy:

For a given feature, all attributes listed as mandatory are populated. Entries in other fields depend on data availability. The data represents the best available information at the time.

Logical Consistency:

The logical consistency of the databases is defined by validating attributes, topological structure and graphical inconsistency.

Validating Attributes:

All mandatory attributes for all features contain an entry. A check of the database has been completed to ensure that only valid features and attributes are supplied. This has been achieved using Oracle queries. Oracle query tests carried out include:

- Check of valid feature codes;

- Removal of invalid and system feature codes;

- Check for all point features attached to attribute table;

- Tally of all points, attribute table records;

- Check of layer/network assignment of all features; and

- Cross-check for invalid feature code/type combinations.

Topological Structure:

For both GeoVision and ArcInfo the topological structure is fully complete. Corrections were made until Geovision AMS procedures detected zero errors. Iterative corrections were made for anomalous line features detected during the BUILD procedure of ArcInfo. Data was considered topologically clean only after there were zero label errors and node errors in ArcInfo files.

Completeness:

Completeness is checked through systematic comparison against relevant source material. It is up-to-date to december 1989.

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Contact information

Contact organisation: Geoscience Australia (GA)
Contact position: Director, Sales and Distribution, ISB
Mail address: GPO Box 378
Mail address:
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: +61 2 6249 9966
Facsimile: +61 2 6249 9960
Electronic mail address: sales@ga.gov.au

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Metadata information

Metadata date: 2008-09-01

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Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703005382.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703005382.xml

Size of dataset: 86 - 256 KB depending on the format.

Scale/resolution: 1:1 million

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