Named Watercourse Centerlines for New South Wales

Named Watercourse defines the centerline of a named water course as a single feature, aggregating Hydro Line parts. Spatial Services, a business unit of the NSW Department of Customer Service, continuously updates this theme from stakeholder data, aerial imagery, and elevation data. The dataset was initially published in February 2020.

Use Cases

• Map and analyze the spatial network of named rivers and streams using the watercourse centerline feature for environmental planning.
• Integrate watercourse centerlines with elevation data to model flood risk and support hazard mitigation efforts.
• Use the aggregated Hydro Line features as a critical input for the Australian Water Resources Information System (AWRIS).
• Support emergency management response and recovery by providing a foundational hydrology layer for disaster risk assessment.
• Update local government asset management systems with authoritative watercourse data sourced from custodians and aerial imagery.

Strengths

• Dataset is continuously updated by Spatial Services through a regular cycle using aerial imagery and elevation data.
• Provides the NSW component of the authoritative Australian Hydrological Geospatial Fabric.

Limitations

• The service is scheduled for retirement, indicating potential future access issues and requiring transition to a new GDA2020 service.
• Spatial reference is WGS 84 aligned to GDA94, which may cause misalignments in modern GDA2020 coordinate environments.
• Specific row counts, column details, and temporal coverage of individual features are not provided in the available metadata.

Provenance

Source

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

Collection Method

Aggregated from Hydro Line parts; updated via stakeholder data, internal/external database verification, research, and aerial imagery.

Time Range

Initial publication date is 06/02/2020; data currency date is listed as 01/01/3000, indicating intended long-term maintenance.

Freshness

Data update frequency is listed as 'Other'; last platform update was recorded in April 2026.

Geography

State of New South Wales, Australia.