Geoscience Australia: Appendix U - Imagery Interpretation Guide

Updated: 1 December 2007

2.2.4 Road Bridges


Location of Example:	152°50'22" East, 25°59'32" South
Distinctive Characteristics:	Road bridges generally cross bodies of water, or low lying areas along the road network. Bridges are often evident by the thinning of the road where the bridge begins and the corridor either side of the road disappears. In Figure 2.2.4.2a the shadows cast by the bridge is evident In Figure 2.2.4.2b the shadow signature indicates a change in elevation being traversed by the road which strongly indicates the presence of a bridge.
Regional Considerations:
Figure: 2.2.4.2 Representation of Road Bridge Lines.

Figure: 2.2.4.2a Orthophotography 60cm RGB=123 Figure: 2.2.4.2b SPOT 2.5m RGB=321