NSW Survey Marks: Geodetic Control Points with GDA2020 Coordinates

A dynamic web service maps permanent survey marks that constitute the official state control survey network for New South Wales, Australia. The data is sourced from the Survey Control Information Management System (SCIMS), the single source of truth for marks within the network. The service provides GDA2020 coordinates, heights, accuracy classifications, and status information for each mark.

Use Cases

• Plan cadastral surveys based on official state control survey mark locations and accuracy data.
• Conduct flood studies and hydrographic modelling using precise elevation and coordinate data.
• Support infrastructure development and site calibration at construction sites with accurate geodetic reference points.
• Perform elevation modelling for terrain analysis using surveyed height information.

Strengths

• Serves as the official state control survey network data, sourced from the authoritative SCIMS database.
• Provides multiple data attributes per mark including type, coordinates, heights, accuracy class, and status.
• Data is presented in the modern GDA2020 coordinate reference system, equivalent to WGS84@2020.

Limitations

• Column-level documentation is absent; field semantics must be inferred after accessing the service.
• The service has a spatial reference of WGS 84 = GDA2020 and cannot be easily consumed into older GDA94 environments.
• Row count is unknown, which may limit suitability assessment for large-scale analyses.

Provenance

Source

Spatial Services (DCS), New South Wales government.

Collection Method

Fed from the Survey Control Information Management System (SCIMS).

Freshness

Last updated 2026-05-18 02:40:46.374718; freshness should be verified.

Geography

New South Wales, Australia.