Updated: 1 December 2007

2.3.5 Dams Example 3

Location of Example: 149°6'00" East, 28°46'14" South
Distinctive Characteristics:
  • Dams can be differentiated from vegetation on thematic imagery by their blue signature compared with the red signature of the vegetation.
  • Dams can also be identified by the surrounding earth which was disturbed or displaced during the construction of the Dam. This can aid in distinguishing dry dams from depressions.
  • Spectral response may also indicate the presence of water even in a dry dam. In Figure the SPOT imagery indicates a presence of the water with the light blue signature.
Regional Considerations:
Figure: Representation of Dams

Figure: Orthophotography 60cm RGB=123 Figure: SPOT 2.5m RGB=123

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