LAYER NAME: Lakes - GMD  

ANZLIC Identifier ANZCW0702000050

TITLE:
Global Map Data Australia 1M

CUSTODIAN:
Geoscience Australia - National Mapping Division (formerly AUSLIG)

JURISDICTION:
Australia

ABSTRACT:
The Global Map is a 1:1,000,000 scale framework dataset of the world.
It consists of vector and raster layers of administrative boundaries, drainage, transportation, population centres, elevation, vegetation, land use and land cover data.

SEARCH WORDS:
BOUNDARIES LAND Topography VEGETATION
FORESTS MARINE Coasts WATER
HERITAGE Natural TRANSPORTATION WATER Hydrology
HUMAN ENVINONMENT TRANSPORTATION Air WATER Lakes
LAND TRANSPORTATION Land WATER Rivers
LAND Geography

GEOGRAPHIC EXTENT NAME(S):
Australia including external territories other than the Australian Antarctic Territory
Australia Bounding Coordinates:
North Bounding Coordinate: -5
South Bounding Coordinate: -55
East Bounding Coordinate: 170
West Bounding Coordinate: 72

BEGINNING DATE:
1999-07-01

ENDING DATE:
2001-06-30

PROGRESS:
Complete

MAINTENANCE AND UPDATE FREQUENCY:
Not Planned

STORED DATA FORMAT:
DIGITAL Vector
DIGITAL Raster

AVAILABLE FORMAT TYPE(S):
DIGITAL Vector Product Format
DIGITAL ESRI Shapefile DIGITAL BIL

ACCESS CONSTRAINTS:
Data files may be downloaded from Geoscience Australia's website at http://www.auslig.gov.au/download/register_gmd.htm. The data are subject to Commonwealth of Australia Copyright.
A licence agreement is required.

LINEAGE:
The Australian component of the Global Map vector data is primarily sourced from TOPO-250K Series 1 and other feature based reference databases held by Geoscience Australia. 1:1M MAPDATA based upon the World Aeronautical Charts (WACs) was used to derive the appropriate amount of detail for the Global Map.
The source data for the raster data layers was supplied by the United States Geological Survey and consisted of the revised Global 30" Elevation dataset (GTOPO30) produced by EROS and data derived from the Global Landcover Characteristics Database (CLCCD), a cooperative venture between USGS, the University of Nebraska-Lincoln and the European Commission's Joint Research Centre (JRC). The land cover, land use and vegetation layers were edited by Geoscience Australia to reflect some errors of classification. However, it was not subjected to a thorough vetting.

POSITIONAL ACCURACY:
Global Map data complies with the following statement of horizontal accuracy: 90% of points have an absolute horizontal accuracy of less than or equal to +2km. In the case of data obtained from satellite images, the maximum error is less than or equal to 0.5km. The vertical accuracy is notionally +150 metres for 90% of points.

ATTRIBUTE ACCURACY:
For the global Map product, attribute accuracy is a measure of the degree to which the attribute values of features agree with the information on the source material. There is a maximum error in attribute accuracy of 5%, at a 99% confidence level.

LOGICAL CONSISTENCY:
Logical consistency is a measure of the degree to which data complies with the technical specification. Logical consistency was validated by tests to check that table and file names are set out as in the Data Dictionary. Graphical tests checking such things as intersections, polygon closure, minimum sizes of polygons and length of linear features were also carried out.

COMPLETENESS:
Completeness is a measure of the degree to which all features listed in the technical specification have been captured, in accordance with the selection criteria, definitions and other rules specified. All instances of a feature and its attribute values that meet the selection criteria and appear on the source materials are captured. The data is generalised so the selection of features is to some extent subjective.

CONTACT ORGANISATION:
Geoscience Australia - National Mapping Division

CONTACT POSITION:
Data Sales, Customer Support

MAIL ADDRESS:
PO Box 2

SUBURB OR PLACE OR LOCALITY:
BELCONNEN

STATE OR LOCALITY:
ACT

COUNTRY:
Australia

POSTCODE:
2616

TELEPHONE:
Australia Fixed Network number
+61 2 6201 4340
Australia Freecall
1800 800 173

FACSIMILE:
Australia Fixed Network number
+61 2 6201 4381

ELECTRONIC MAIL ADDRESS:
datasales@auslig.gov.au

METADATA DATE:
2001-09-01
METADATA REFERENCE:
HTML http://www.auslig.gov.au/meta/meta70.htm
XML http://www.auslig.gov.au/meta/meta70.xml

ATTRIBUTES
Airport Railroad
Bridge River
Dam Road
Inland Water Trail
Island

SCALE/RESOLUTION
1:1,000,000

RESTRICTIONS ON USE
The data are subject to Commonwealth of Australia Copyright. A licence agreement is required.

SIZE OF DATASETS
VPF: 80.8Mb Shapefiles: 246.7Mb Raster: 155.5Mb