GEODATA TOPO 100K ACT Region

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: ANZCW0703008968

Title: GEODATA TOPO 100K ACT Region

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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GEODATA TOPO 100K ACT Region is a vector data representation of the ACT Region NATMAP 1:100,000 (100K) scale topographic map and has been developed to conform to Geoscience Australia's Topographic Data and Map Specifications Version 4.0, February 2006. Themes include: Administation; Aviation; Cartography; Culture; Drainage; Framework; Habitation; Industry; Physiography; Rail transport; Relief;

Road transport; Series index; Survey marks; Utility; Vegetation; and Waterbodies.

It has been specifically designed for use in Geographic Information Systems (GIS) and provides high quality data for mapping and GIS professionals. The data is available in three popular GIS formats (ESRI Personal Geodatabase, ESRI Shapefiles and MapInfo mid/mifs) as well as a raster (ECW).

ANZLIC search words:

BOUNDARIES Mapping
ENERGY Mapping
FORESTS Mapping
HERITAGE Natural Mapping
HUMAN ENVIRONMENT Mapping
LAND Mapping
MARINE Mapping
TRANSPORTATION Mapping
UTILITIES Mapping
VEGETATION Mapping
WATER Mapping

Spatial domain:

locality map

Geographic extent polygon: 148.5 -35, 149.5 -35, 149.5 -40, 148.5 -40, 148.5 -35,

Geographic bounding box:: North bounding latitude: -35 °; South bounding latitude: -40 °; East bounding longitude: 149.5 °; West bounding longitude: 148.5 °

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Data currency

Beginning date: Not Known

Ending date: 2005-12-31

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Dataset status

Progress: Complete

Maintenance and update frequency: As required

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Access

Stored data format:: DIGITAL - egeodatbas Enterprise Geodatabase ArcSDE Geographic GDA94

Available format type:: DIGITAL - mif MapInfo Interchange Format (MIF) MapInfo Geographic GDA94; DIGITAL - pgeodatbas Personal Geodatabase ArcGIS Geographic GDA94; DIGITAL - shp ArcView shape file ArcView Geographic GDA94; DIGITAL - ecw ER Mapper Enhanced Compressed Wavelet (ECW) Geographic GDA94

Access constraints:

The data is subject to Commonwealth of Australia Copyright. A licence agreement is required and a licence fee is also applicable for pakaged data.

Free Data Download

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Data quality

Lineage:

GEODATA TOPO 100K ACT Region was generated from the 100K ACT Region NATMAP hardcopy map released in early 2005. The map was revised from previous editions and revision material including:

- SPOT and Landsat satellite imagery;

- Revision data (i.e. airfields, vegetation, dams, utilities, foot tracks, mines, railways and towers);

- Reproduction material (i.e. map production material from previous maps); and

- Public feedback.

The digital files used to create the map were converted to topographic data to be in line with Version 4.0 Specifications.

Positional accuracy:

The positional accuracy is the statistical estimate of the degree to which planimetric coordinates and elevations of features agree with their world values. It is impacted by three sources of errors: positional accuracy of the source material; errors due to the conversion processes; and errors due to the manipulation processes.

This represents an error of 34 meters on the ground for 100K data. Alternative and equal ways of expressing this error is 'not more than 10% of well defined points will be in error by more than 56m'.

Attribute accuracy:

Attribute accuracy is a measure of the degree to which the attribute values of features agree with the information on the source material. The allowable error in attribute accuracy ranges from 0.5% to 5%, at a 99% confidence level. Where less than 1% of attribute errors are permissable the entire population is tested. Where a less stringent limit is set for allowable errors, a random subset of the relevant fetures is tested.

Logical Consistency:

Logical consistency is a measure of the degree to which data complies with the technical specification. This involves tests to check that the table and file/field names are set out as in the data dictionary. It also involves a graphical test to check intersections, polygon closure, minimum sizes of poplygons and topological relationships. The allowable error in logical consistency ranges from 0% to 5%.

Completeness:

All instances of a feature and its attribute values that apper on the source material have been captured unless otherwise indicated in the selection criteria for that feature.

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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/ANZCW0703008968.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703008968.xml

Size of dataset: 201MB for personal geodatabase and around 100MB for Shapefiles and Mid/Mifs.

Scale/resolution: 1:100 000

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