NSW Survey Marks: GDA2020 Coordinates and Heights for State Control Network

Daily updated coordinates and heights for survey marks forming the official NSW state control network, provided by Spatial Services. The service offers GDA2020 coordinates, heights, accuracy classifications, and mark status information for each survey point. Data is accessible via an OGC-compatible web service, facilitating integration into GIS applications.

Use Cases

• Cadastral survey planning based on official survey mark coordinates and accuracy data.
• Flood studies and hydrographic modelling based on surveyed height data.
• Site calibration at construction sites based on precise horizontal and vertical control points.
• Elevation modelling based on surveyed height data and accuracy classifications.
• Preservation of survey infrastructure based on mark status information (e.g., destroyed, restricted access).

Strengths

• Coordinates are provided in the official GDA2020 datum, ensuring alignment with current Australian standards.
• Data includes accuracy classifications (class and order) for both horizontal coordinates and heights.
• Service supports requests in multiple coordinate reference systems, enhancing interoperability.
• Update frequency is daily, suggesting regular maintenance and currency.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Spatial Services, a business unit of the Department of Customer Service NSW.

Collection Method

Data provider files from the official State control survey network (SCIMS).

Freshness

Daily

Geography

New South Wales, Australia