|
|
|
You are here: Home > GA Metadata
|
||||
|
GA Metadata Related Links |
GEODATA TOPO 250K Series 3 - Online and customised (including MapConnect)Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2. Dataset citationANZLIC unique identifier: ANZCW0703008969 Title: GEODATA TOPO 250K Series 3 - Online and customised (including MapConnect) CustodianCustodian: Geoscience Australia Jurisdiction: Australia DescriptionAbstract: Series 3 contains a medium scale vector representation of the topography of Australia. The data include the following ten themes and 92 feature classes: Cartography: Annotations, CartographicLines, CartographicPoints, GraticuleAnnotations, Graticules, GridAnnotations and Grids 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:
Spatial domain:
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
Data currencyBeginning date: 2006-05-09 Ending date: Not Known Dataset statusProgress: Complete Maintenance and update frequency: Irregular Access
Access constraints: The data are subject to Commonwealth of Australia Copyright. A licence agreement is required and a licence fee is also applicable for packaged data (included in the purchase price). Geodata TOPO250K Series 3 replace Series 1 and 2. Order ProductData qualityLineage: 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
Metadata informationMetadata date: 2009-03-31 Additional metadataMetadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703008969.html Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703008969.xml Scale/resolution: 1:250 000 Projection/datum: Datum: GDA94 Projection: Geographical - latitude and longitude |
|||
|
SPATIAL INFORMATION FOR THE NATION
|