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GEODATA TOPO 250K Series 3 for Google Earth

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.


Dataset citation

ANZLIC unique identifier: ANZCW0703012315

Title: GEODATA TOPO 250K Series 3 for Google Earth


Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia


Description

Abstract:

GEODATA TOPO 250K Series 3 for Google earth is the same data as found in other GEODATA TOPO 250K Series 3 products produced by Geoscience Australia, however is provided in KML format for use with Google Earth. It contains a medium scale vector representation of the topography of Australia. The data include the following nine themes and 86 feature classes:

Elevation: Contours, BenchMarks, HorizontalControlPoints and SpotElevations

Framework: ProhibitedAreas, Reserves, FrameworkBoundaries, Islands, LargeAreaFeatures, Locations, Mainlands, Seas, GeodataIndexes and MapIndexes

Habitation: BuildingAreas, BuildingPoints, BuiltUpAreas, CemeteryAreas, CemeteryPoints, Homesteads, PlaceNames, PopulatedPlaces and RecreationAreas

Hydrography: CanalLines, Locks, RapidLines, Spillways, WatercourseLines, WaterfallPoints, Bores, CanalAreas, Flats, Lakes, PondageAreas, RapidAreas, Reservoirs, Springs, WatercourseAreas, Waterholes, WaterPoints, MarineHazardAreas, MarineHazardPoints and ForeshoreFlats

Infrastructure: AerialCableways, DamWalls, Fences, MarineInfrastructureLines, MarineInfrastructurePoints, VerticalObstructions, WaterTanks, Yards, Conveyors, MineAreas, MinePoints, PetroleumWells and StorageTanks

Terrain: Caves, Craters, DeformationAreas, Discontinuities, Pinnacles, SandRidges and Sands

Transport: AircraftFacilityPoints, RailwayBridgePoints, RailwayCrossingLines, Railways, RailwayStopPoints, RailwayTunnelLines, RailwayTunnelPoints, BarrierPoints, FerryRouteLines, FootTracks, RoadCrossingLines, RoadCrossingPoints, Roads, RoadTunnelLines and RoadTunnelPoints

Utility: Pipelines and Powerlines

Vegetation: ClearedLines, CultivatedAreas, NativeVegetationAreas and Windbreaks

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 name: AUSTRALIA EXCLUDING EXTERNAL TERRITORIES - AUS - Australia - Australia

Geographic extent polygon: 112.8 -8.9, 154.1 -8.9, 154.1 -44, 112.8 -44, 112.8 -8.9,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:
North bounding latitude: -8.9 °
South bounding latitude: -44 °
East bounding longitude: 154.1 °
West bounding longitude: 112.8 °

Data currency

Beginning date: 2006-05-09

Ending date: Not Known


Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Access

Stored data format:
DIGITAL - KML Keyhole Markup Language (KML) Google Earth Map Grid of Australia (MGA) WGS84
Available format type:
DIGITAL - KML Keyhole Markup Language (KML) Google Earth Map Grid of Australia (MGA) WGS84

Access constraints:

This data is released under the Creative Common Attribution 3.0 Australia Licence. Geodata TOPO250K Series 3 replace Series 1 and 2.

Order Product

Data quality

Lineage:

GEODATA TOPO 250K Series 3 is primarily sourced from GEODATA TOPO 250K Series 2 and 1:250 000 scale map reproduction material (from the National Topographic Map Series and Defence Joint Operation Graphics). A key revision source for the data is satellite imagery taken from the SPOT Panchromatic and LANDSAT Thematic Mapper Sensors. Revision material has also been gathered from a variety of authoritative sources. More information about the sources for this data can be found in Geoscience Australia's "http://www.ga.gov.au/mapspecs/250k100k" Topographic Data and Map Specifications.

Positional accuracy:

Geoscience Australia has carried out both error budget analysis and limited field tests to verify the positional accuracy of the data. GEODATA TOPO 250K Series 3 data complies with the following statement of horizontal accuracy: "The summation of errors from all sources results in data with a standard deviation of 85 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 140 metres; and, in the worst case, a well defined point is out of position by 300 metres. As the GEODATA TOPO 250K Series 3 data were digitised from existing map production material, some features may be subject to cartographic displacement.

Vertical Accuracy: The accuracy of the spot elevations in the relief layer varies with the type of source material from which they were captured and the point determination for each particular point. Most spot heights have an accuracy of + or - 5 metres, however bench marks and horizontal control points have an accuracy of + or - 1 metre. The accuracy of contours is defined as 1/2 of the contour interval, for example + or - 25 metres for a 50 metre contour interval.

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. Further information on the validation and testing methodology used by Geoscience Australia can be found in Appendix J of the Topographic Data and Map Specifications.

Logical Consistency:

Validating logical consistency may involve tests to check that table and file names are set out as in the Data Dictionary. Also included are graphical tests which check such things as intersections, polygon closure, minimum sizes of polygons and topological relationships. The allowable error in logical consistency ranges from 0% to 5%. Further information on the validation and testing methodology used by Geoscience Australia can be found in Appendix J of the Topographic Data and Map Specifications.

Completeness:

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


Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address: sales@ga.gov.au

Metadata information

Metadata date: 2013-03-08


Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703012315.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703012315.xml

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Authors:GEODATA
SPATIAL INFORMATION FOR THE NATION