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Creative Commons Attribution 3.0 Australia Licence
TAS
vector
http://services.thelist.tas.gov.au/arcgis/rest/services/Public/TopographyAndRelief/MapServer/1, http://listdata.thelist.tas.gov.au/opendata/index.html#LIST_Survey_Control
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Latitude and longitude, UTM coordinates and height of survey control marks. From LIST the latitude and longitude / UTM coordinates are available in the Geocentric Datum of Australia 2020 (GDA2020) and the Geocentric Datum of Australia 1994 (GDA94). Coordinates in Australian Geodetic Datum 1966 (AGD66) are available from the custodian. Coordinates on all datums are not available for every mark. Height information is expressed relative to a number of datums. The quality of control mark coordinate information is expressed in terms of Positional Uncertainty for GDA2020 coordinates and Class and Order for GDA94, AGD66 and height datum coordinates. Attribute information may include the mark type, date established, access type and comments on condition. An abbreviated description of any visible target is included. Mark status indicates if control mark has been reported not found, or is destroyed but the reference marks still exist.
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The source is primarily control surveys carried out by DPIPWE Land Tasmania Division, but does include information supplied by other agencies, professional surveyors and members of the public.
Lineage Description
Position Accuracy: Varies depending on the survey and source of information. Attribute Accuracy: Rigorous positional uncertainty is assigned to GDA2020 coordinates in accordance with ICSM Special Publication 1 (SP1) Standards and Practices for Control Surveys (Version 2.2). Class and order are assigned to both horizontal coordinates and heights in accordance with ICSM Special Publication 1 (SP1) Standards and Practices for Control Surveys (version 1.7). The accuracy of this attribute information is estimated to be 99%. Logical Consistency: N/A Completeness: The data set is essentially complete. Additional data is added when survey control marks that have been destroyed are replaced. Information and advice about the position, status or condition of existing marks is updated as it is received. Additional: A summary of the datum realisations applied in Tasmania is available at https://dpipwe.tas.gov.au/land-tasmania/geospatial-infrastructure-surveying/geodetic-survey/coordinate-height-and-tide-datums-tasmania Further information about coordinate quality indicators and Positional Uncertainty is available at https://dpipwe.tas.gov.au/land-tasmania/geospatial-infrastructure-surveying/geodetic-survey/survey-control-marks-database-%28surcom%29 An explanation of terms used in the attribute information and summarised in the legend in the Layer tab of LISTmap is available and can be viewed at: https://surcom.dpipwe.tas.gov.au/surcom/jsp/instructions_public.jsp#terms SP1 (version 1.7) was superseded in October 2013 by SP1 (version 2) which completed the transition from CLASS and ORDER to uncertainty as the basis for evaluating and expressing the quality of positions. Any queries concerning uncertainty should be directed to the Custodian.
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LIST Survey Control
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ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata
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1.1
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