Geoscience Australia: Appendix U - Imagery Interpretation Guide

Updated: 11 December 2006

2.2.5 Railways


Location of Example:	152^o48'29" East, 25^o18'31" South
Distinctive Characteristics:	Railways are generally thinner than roads with fewer intersections. They have smooth curves and bends with no abrupt changes in direction. Generally there are a lack of access points, buildings and infrastructure along the railway line. In Figure: 2.2.5.1a the colour of the railway line is similar to the surrounding area, due to the lack of pavement. In Figure: 2.2.5.1b the spectral signature of the railway (red) is similar to the surrounding vegetation and landscape, as opposed to the road which stands out as bright blue.
Regional Considerations:
Figure: 2.2.5.1 Differentiation of Railways from Roads.

Figure: 2.2.5.1a Orthophotography 60cm RGB=123 Figure: 2.2.5.1b SPOT 2.5m RGB=123