City of Melbourne – Preparation of Road and Park Surface Polygons
To assist with the registration and management of road and park assets, Council needed a series of surface polygons over the roads and parks within the municipality.
Preparation of Road and Park Surface Polygons
Background
The City of Melbourne is developing and configuring an asset management software solution for all Council assets. To assist with the registration and management of road and park assets, Council needed a series of surface polygons over the roads and parks within the municipality.
Objectives
A fully defined set of discrete polygons that represent particular assets within all roads and parks. The polygon boundaries were defined according to prescribed attributes including classification, type and material. Generally each polygon will represent a discrete asset within Council’s AMS.
Scope of Services
Compile discrete polygons for all roads, reserves and parks under Council’s control including:
- Roadways and reserves
- Park areas within public land and Council controlled land
- Medians, roundabouts, splitter islands and physical lane delineation devices within roadways Bridges, waterways and watercourses.
The following assets were defined by polygons:
- Footpaths
- Kerbs
- Kerb & channels
- Roadways
- Medians
- Roundabouts
- Off-road pedestrian & bike paths
- Traffic islands
- Nature strips
- Tramways
- Tram super stops
- Shrub beds (incl. garden beds)
- Roundabouts
- Turf areas
- Open drains
- Waterways
- Watercourses
- Bridges
- Retaining walls
Important considerations affecting the definition of a polygon include:
- Photogrammetric data of the relevant areas (varied between 1994 and 2002)
- Aerial imagery
- Street and pathway segment information
- Park feature surveys where available
- CAD Layers for infrastructure
Methodology
The methodology was complex and included:
- Evaluation of existing datasets and extraction of existing line work
- CAD plotting
- GIS data manipulation
- Cross section surveys
- High accuracy GPS / GNSS surveys
- Total station feature surveys
- Field verification of materials and other attributes
- Topology checks and GIS data cleansing
Outputs
Project deliverables included:
- An ArcMap shapefile showing all surface polygons and all required attributes
- An Excel spreadsheet containing the polygon ID, location, asset classification and surface material.
- A report of the project outlining any issues, constraints or techniques that the Consultant wishes to raise with Council.
