Geophysical Investigation to Map Historic Tram Tracks Along a Roadway, Sydney, NSW (Q4 2015).

  • The survey grid used during collection and tram line locations marked on the roadway.
  • Tram track locations marked onsite.
  • The operator picking up the locations of the tram track using high accuracy GPS.
  • An example of the 2D radar scans showing the tram line locations (top) and associated sleepers (bottom).

GBG Australia undertook a non-destructive geophysical investigation to map the locations of historic tram tracks along a stretch of road with metropolitan Sydney, NSW. For this investigation Ground Penetrating Radar (GPR) was used to locate the tram tracks.

The GPR data was collected using the GSSI SIR3000 data collection system. Attached to the collection system a 400MHz shielded antenna which allowed for a good balance between depth of penetration and resolution. The location of the tram tracks were marked on the roadway with their position being picked up using high accuracy GPS. All survey instruments used in this investigation were supplied by GBG Australia.

Figure 1: The survey grid used during collection and tram line locations marked on the roadway.

Figure 2: Tram track locations marked onsite.

Figure 3: The operator picking up the locations of the tram track using high accuracy GPS.

Figure 4: An example of the 2D radar scans showing the tram track locations (top) and associated sleepers (bottom).