NSW Positioning Theme - Survey Mark GDA2020 multiCRS

MultiCRS service - supporting requests in multiple Coordinate Reference Systems - Information Sheet

A new series of ‘multiCRS’ web services have been published to support GDA2020. These new ‘multiCRS’ services:

· have a spatial reference of GDA2020

· support alignment with GDA2020, GDA94 or [WGS 84-aligned-to-GDA2020] GIS environments,
using built-in server-side transformations:

o GDA94 < NTv2-CPD > GDA2020

o GDA94 < NTv2-CPD > WGS 84 aligned to GDA2020

o GDA2020 < NULL > WGS 84 aligned to GDA2020

Note: ESRI software will automatically align by transforming from the sourceSpatialReference (GDA94).
Other software may need to set client-side transformations from the SpatialReference (GDA2020).

Note: Client-side transformation(s) can be used to over-ride these default transformations.

The original [WGS 84-aligned-to-GDA2020] is still available, without the ‘multiCRS’ suffix. In due course, and allowing time for user feedback and testing, it is intended that the original service name will adopt this new multiCRS functionally.

Please note that SCIMS Online is the official option for obtaining state control survey data for cadastral surveys as it offers legal traceability. SCIMS online is accessible via the Spatial portal.

Metadata Portal Metadata Information

Content Title	NSW Positioning Theme - Survey Mark GDA2020 multiCRS
Content Type	Hosted Feature Layer
Description	This service provides GDA2020 coordinates, heights and related information for NSW survey marks that form the official State control survey network (as reported in SCIMS). This service supports requests in multiple coordinate reference systems. This service controls the precision of numerical output in a manner that mirrors SCIMS Online available through the Spatial Services Portal. The web service provides a wealth of data on each mark, including: Mark type (Permanent Mark, State Survey Mark, etc.) Mark number Horizontal coordinates and their accuracy (class and order) Heights and their accuracy (class and order) Status of the mark (destroyed, restricted access, etc.) The mark type is represented using various shapes and the accuracy of the mark (both vertical and horizontal) is communicated by the colour. This web service allows users to easily integrate survey control mark data from SCIMS into Open Geospatial Consortium (OGC) compliant spatial platforms and applications. Data provided by the NSW Survey Mark web service can be used in a variety of engineering and surveying applications, including but not limited to: Cadastral survey planning Flood studies and hydrographic modelling Infrastructure development Site calibration at construction sites Elevation modelling Preservation of survey infrastructure. The NSW Survey Mark web service gives users an alternative method to access state control survey data that can be incorporated into their GIS package without needing to log into SCIMS Online. Please note that SCIMS Online is the official option for obtaining state control survey data for cadastral surveys as it offers legal traceability. SCIMS online is accessible via the Spatial portal.
Initial Publication Date	24/06/2019
Data Currency	01/01/3000
Data Update Frequency	Daily
Content Source	Data provider files
File Type	Map Feature Service
Attribution	© State of New South Wales (Spatial Services, a business unit of the Department of Customer Service NSW). For current information go to spatial.nsw.gov.au
Data Theme, Classification or Relationship to other Datasets	NSW Positioning Theme of the Foundation Spatial Data Framework (FSDF)
Accuracy	This dataset depicts the location of survey marks based on their official GDA2020 coordinates. Survey mark positional accuracy is reported in the data fields for each mark and varies from mark to mark. Over time mark accuracy will change when new observations are added, and survey adjustments are completed. For additional information, please contact us via the Spatial Services Customer Hub
Spatial Reference System (dataset)	GDA2020
Spatial Reference System (web service)	Other
WGS84 Equivalent To	GDA2020
Spatial Extent	Full State
Content Lineage	For additional information, please contact us via the Spatial Services Customer Hub
Data Classification	Unclassified
Data Access Policy	Open
Data Quality	High. Methodology and accuracy standards are defined in the NSW Surveyor General’s directions. For additional information, please contact us via the Spatial Services Customer Hub
Terms and Conditions	Creative Commons
Standard and Specification	Open Geospatial Consortium (OGC) implemented and compatible for consumption by common GIS platforms. Available as either cache or non-cache, depending on client use or requirement.
Data Custodian	DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Point of Contact	Please contact us via the Spatial Services Customer Hub
Data Aggregator	DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Data Distributor	DCS Spatial Services 346 Panorama Ave Bathurst NSW 2795
Additional Supporting Information	Data Dictionaries