Survey Marks

Dataset Number2239
Dataset TitleSurvey Marks
CustodianData Authority: Department for Trade and Investment
Data Provider: Location SA

Description

DescriptionSurvey mark information within South Australia and was created to support the Surveyor General's statutory responsibilities. Survey mark data underpins the State's cadastre and provides valuable reference data to a wide clientele, including the Surveying Industry in particular. Information stored against the survey mark are coordinates, elevations, accuracy statements and descriptive information about survey marks It comprises approximately 190000 survey marks. All permanent survey marks are registered. Non permanent survey marks that form part of the state's horizontal and/or vertical control network are also generally registered.
UsageUnderpins the State's cadastre and provides valuable reference data especially to the Surveying Industry

Data Quality

LineageThe source data for the Survey Marks was originally obtained from hardcopy indexing systems maintained by various South Australian government agencies, principally the former Department of Lands. These various datasets were converted to digital form in the late 1970's and have been maintained digitally ever since.
Completeness100% complete
Positional AccuracyPositional accuracy for each survey mark is noted in the dataset with values for Order and Class included. The positions of many survey marks have been determined by survey, to varying degrees of survey accuracy. Within Tertiary Network Areas the absolute accuracy of a Third order survey mark is approximately +/- 0.07m at a 95% confidence level. The relative accuracy of a Third order survey mark is approximately +/- 0.02m at a 95% confidence level. This level of accuracy is typical in suburban areas. In areas where a geodetic network has not been established, coordinates have been determined by digitising with reference to the Parcel Cadastre In these cases positional accuracy is dependent on the accuracy of the Parcel Cadastre.

Geographic Extent

Extent NameSouth Australia
Min Easting or Longitude129
Min Northing or Latitude-38.25
Max Easting or Longitude141
Max Northing or Latitude-26

Dataset Status

Initially Acquired1960
Last UpdatedCURRENT
Update FrequencyDaily
Maintenance Methoddigitally located with reference to Parcel Cadastre for marks with order 9 accuracy. computed for all other accuracy orders
AusGOALCC BY (Attribution)

Attributes

TableNameField AliasData TypeDescription
Primary TablelongitudeLongitudeDoubleLongitude Value in GDA2020 decimal degrees
Primary TablelaitudeLatitudeDoubleLatitude Value in GDA2020 decimal degrees
Primary TableheightHeightCharacterVertical component in metres
Primary Tablemark_noMark NotextMark number - unique identifier
Primary TableZONEZoneLong IntegerMGA 1994 zone value where mark is located
Primary TableEASTING EastingDoubleEasting coordinate value in MGA2020
Primary TableNORTHING NorthingDoubleNorthing coordinate value in MGA2020
Primary TableH_DATUMHorizontal DatumtextThe horizontal datum being used
Primary TableH_ORDERHorizontal OrderLong IntegerValue 1 ¿ 9 based on highest to lowest accuracy respectively
Primary TableH_(FIXING) METHODHorizontal Fixing MethodtextAttribute indicating method used for fixing mark¿s horizontal value
Primary TableH_PURPOSEHorizontal PruposetextType of survey to create horizontal value
Primary TableH_AUTHORITYHorizontal AuthoritytextIndicates under which authority mark was created
Primary TableH_ADJUSTEDHorizontal AdjustedtextIndicates if a point has been through a least squares horizontal adjustment or not.
Primary TableH_POSITIONALUNCERTAIHorizontal Positional UncertaintyDoubleValue indicating the uncertainty of the coordinates
Primary TableH_ENTRYDATEHorizontal Entry DateDateDate current Easting and Northing (mark) were (was) entered
Primary TableH_COMMENTHorizontal CommenttextAdditional information relating to the horizontal value
Primary TableV_DATUMVertical DatumCharacterThe vertical datum being used
Primary TableGS_SEP DoubleGeoid ¿ spheroid separation
Primary TableV_ORDERVertical OrderLong IntegerValue 1 ¿ 9 based on highest to lowest accuracy
Primary TableV_FIXINGVertical Fixing MethodtextAttribute indicating method used for fixing mark¿s vertical value
Primary TableV_PURPOSEVertical PurposetextType of survey to create vertical value
Primary TableV_AUTHORITYVertical AuthoritytextIndicates under which authority mark was created
Primary TableV_ADJUSTEDVertical AdjustedtextIndicates if a point has been through an adjustment or not
Primary TableV_POSITIONALUNCERTAIVertical PositionDoubleValue indicating the uncertainty of the coordinates
Primary TableV_ENTRYDATEVertical Entry DateDateDate current vertical value (data) was entered
Primary TableV_COMMENTVertical CommenttextAdditional information relating to the vertical value
Primary TableMARKTYPEMark TypetextDescribes the type of survey mark being recorded
Primary TableSPECATTRIBUTESSpecial AttributestextIndicates status such as Network Mark, Trig Station or both
Primary TableGONEGonetextFlag indicating mark has been destroyed
Primary TableWASNOWWas\NowNumberFlag indicating currency of mark number
Primary TableDUPMARKNODuplicate mark NumbertextPrevious or new Mark name
Primary TableSYMBOLOGY DoubleValue indicating what type of mark symbol will be displayed
Primary TableH_COORDINATIONDATEHorizonal Coordination DateBinaryDate of Survey for horizontal coordination
Primary TableV_COORDINATIONDATEVertical Coordination DateBinaryDate of Survey for vertical coordination
Primary TableH_REFERENCEHorizontal ReferenceBinaryDocket or file reference number for horizontal information
Primary TableV_REFERENCEVetical ReferenceBinaryDocket or file reference number for vertical information
Primary TableELLLIPSIOD_HEIGHTEllipsiod HeightBinaryEllipsoid Height

Contact Information

OrganisationDepartment for Trade and Investment
Planning and Land Use Services
Postal Address101 Grenfell Street

ADELAIDE
5000
Emaillsgspatialdata@sa.gov.au