New South Wales Aggregated Road Segments in GDA2020

Aggregated Way Segment is a line feature class representing sets of road segments sharing a common function or characteristic, such as road type or administrative grouping. The dataset is part of the NSW Transport Theme within the Foundational Spatial Data Framework and is published by Spatial Services, a business unit of the Department of Customer Service NSW. It was initially published on 06/02/2020 and has been updated to align with the national GDA2020 spatial reference system.

Use Cases

• Analyze road network composition by grouping road segments based on shared attributes like function class or administrative region.
• Generate aggregated road features for cartographic simplification or high-level network analysis using the 'staging class' geometry.
• Assess spatial accuracy of road features against map scales ranging from 1:500 to 1:250,000 for quality control in positioning applications.

Strengths

• Spatial accuracy is defined per National Mapping Council standards, with positional accuracy within 0.5mm at map scale for 90% of well-defined points.
• Dataset is aligned with the national GDA2020 spatial reference standard, improving consistency and compatibility with modern positioning technologies.
• Part of a structured foundational framework (FSDF) with a documented ongoing program to upgrade spatial location and accuracy.

Limitations

• Aggregated Way Segments do not have an implied topology and are not necessarily connected to form a complete network, limiting some network analyses.
• The data currency date is listed as 01/01/3000, which is a placeholder and does not provide clear information on actual temporal coverage or update recency.
• Spatial accuracy varies significantly with source scale, from 0.25 meters at 1:500 scale to 50 meters at 1:100,000 scale, introducing inconsistency.

Provenance

Source

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

Collection Method

Captured by utilising the best available source data at scales ranging from 1:500 to 1:250,000.

Time Range

Initial publication date is 06/02/2020. Specific temporal coverage of the source data is null.

Freshness

Data update frequency is listed as 'Other'. The service was updated to GDA2020, but a specific update schedule is not stated.

Geography

State of New South Wales, Australia.