NSW Survey Control Marks: GDA2020 Coordinates and Accuracy

Spatial Services provides GDA2020 coordinates, heights, and accuracy classifications for permanent survey marks that form the official state control survey network in New South Wales, Australia. Data is sourced from the authoritative Survey Control Information Management System (SCIMS) and is accessible via a multi-coordinate reference system web service. The dataset includes mark type, number, horizontal and vertical coordinates with their class and order, and status information for each control point.

Use Cases

• Establishing survey control for cadastral (land boundary) surveys based on official mark coordinates and legal traceability.
• Integrating high-precision control points into GIS platforms for georeferencing other spatial data using the multi-CRS API.
• Assessing the suitability of a survey mark for a project by evaluating its horizontal and vertical accuracy class and order.
• Planning field surveys by checking the status of marks (e.g., destroyed, restricted access) to avoid unusable control points.
• Visualizing the distribution and type of state survey infrastructure (Permanent Mark, State Survey Mark) for asset management.

Strengths

• Serves as the official state control survey network, sourced from the single source of truth SCIMS database.
• Provides coordinates in the modern GDA2020 datum with support for multiple coordinate reference systems (GDA2020, GDA94, WGS84).
• Includes detailed accuracy metadata (class and order) for both horizontal coordinates and heights.
• Maintained by the authoritative government organization Spatial Services (DCS).

Limitations

• Column names and a complete schema are not provided in the source metadata, limiting understanding of the full attribute set.
• One source indicates the dataset is 'RETIRING' and users should transition to a new service, creating potential instability.
• Explicit row counts, data size, and license information are not available from the provided sources.

Provenance

Source

Spatial Services (DCS), New South Wales government, via the Survey Control Information Management System (SCIMS).

Collection Method

Officially reported survey data from the state control survey network, served via a hosted ArcGIS Feature Layer.

Freshness

2026-05-18 06:17:09.287132

Geography

New South Wales, Australia.