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Metadata : Auslig Geodata Topo-250k NT (Series 1) Topographic Data |
Index:
Metadata Details:
Name:AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile
Version:1.0
Date Metadata Extracted:2026-05-23
Date Metadata Last Updated:2000-01-14
Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=2DBCB771202806B6E040CD9B0F274EFE
Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=2DBCB771202806B6E040CD9B0F274EFE
Citation
ANZLIC Identifier:2DBCB771202806B6E040CD9B0F274EFE
Title:Auslig Geodata Topo-250k NT (Series 1) Topographic Data
Citation Date:2000-01-14
Date Type:publication
Custodian:Geoscience Australia
Description
Contains a medium scale vector representation of the topographic mapping features of Australia. The data include the following themes:
Hydrography - drainage networks including watercourses, lakes, wetlands and offshore features;
Infrastructure - systems for the transportation of goods and services, ie. roads, railways and associated structures, along with localities, built-up areas and
aeronautical features so that these services may be located; and
Relief - a series of spot elevations, chosen so as to give a representative picture of the terrain.
- biota
- environment
- geoscientificInformation
- oceans
Bounding Coordinates:
- North Bounding Coordinate:-10.998579
- South Bounding Coordinate:-25.998618
- East Bounding Coordinate:138.001246
- West Bounding Coordinate:129.001222
Dataset Status
Dataset ID:ANZNT0001000208
Language:English
Character Set: Latin 1
Progress:completed
Maintenance and Update Frequency:irregular
Data Currency Start Date:
Data Currency End Date:1994-01-01
Access Constraint:The data are supplied under a non-exclusive, non-transferable licence for non-commercial applications within the organisation purchasing the data. The data, or any
product derived from the data, either digital or hard copy, must not be sold, given away, traded, let, hired or other wise dealt with. Licence fees are applicable. Commercial use of the data requires a special licence from AUSLIG.
Data Quality
Lineage:The TOPO-250K product is primarily sourced from the 1:250 000 scale National Topographic Map Series (NTMS) and the Royal Australian Survey Corps' Joint
Operation Graphics (JOG) map reproduction material (repromat). Additionally, digital information for Tasmania was provided by the Mapping Division of the
Tasmanian Department of Environment and Planning and base mapping material for two map areas was provided by the Department of Land Administration,
Western Australia. Where NTMS and JOG maps were published for the same area, the repromat used for the printing of the maps with the latest reliability date was
used as the source. Where both map series were published with identical reliability dates, the NTMS material was used. A full description of the production method
is provided in the TOPO-250K Data User Guide supplied with the data.
Positional Accuracy:TOPO-250K data complies with the following statement of horizontal accuracy:
"The summation of errors from all sources results in data with a standard deviation of 100 metres for well defined features". Alternative and equal ways of expressing
this error are:
Not more than 10% of well-defined points are in error by more than 160 metres; and
In the worst case, a well defined point is out of position by 300 metres.
As the TOPO-250K data were digitised from existing map production material, some features may be subject to cartographic displacement. A full description of the
features that may have been displaced and the range of displacement that may have occurred due to generalisation are provided in the TOPO-250K Data User
Guide supplied with the data.
Attribute Accuracy:For the TOPO-250K product, 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 permissible the
entire population is tested. Where a less stringent limit is set for allowable errors a random subset of the relevant features in the tile is generally tested. The sample
size is determined from statistical tables using the known population size of the relevant feature. A full description of the checks on the data, the test sample size and
the allowable error are provided in the TOPO-250K Data User Guide supplied with the data.
Logical Consistency:For the TOPO-250K product, logical consistency is a measure of the degree to which data complies with the technical specifications. The data were tested using a
mixture of UNIX scripts and ARC/INFO commands which were independent of the production system. Graphical tests were used to check such things as
intersections, polygon closure, minimum size of polygons and topological relationships. A full description of the checks on the data, the test procedure, test sample
size and the allowable error are provided in the TOPO-250K Data User Guide supplied with the data.
Completeness:All instances of a feature and its attribute values that appear on the source material have been captured unless otherwise stated in the selection criteria for that feature
provided in the TOPO-250K Data User Guide supplied with the data. The completeness was tested by overlaying symbolised plots of the data on the source
material and carrying out a visual comparison.
Contacts
Name Organisation Position Role Phone Fax AUSLIG (Australian Survey and Land Info Group) AUSLIG Data Sales custodian 02 6201 4340 02 6201 4381 datasales@auslig.gov.au
Data Dictionary
No data dictionary defined for this dataset
Supplementary Information
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