Proceedings of the sixth international coral reef symposium | Spot images for coral reef mapping in New Caledonia : a fruitful approach for classic and new topics
1988
Bour, William
... The following step described in this paper is the processing of real SPOT images for the same scope but extended to great areas of New Caledonian lagoon. LATICAL, a multi-purpose remote sensing laboratory, was set up in March 1988 at ORSTOM Center of Noumea. The image processing package TEIS was used to classify the pixels of the barrier reef in front of the Baie de St Vincent. In particular, the Tetembia reef, exploited for trochus and living corals was processed to cartography the different biotope of these resources and the surface areas. Although SPOT spectral bands are designed for terrestrial observations, they can be processed for water depth mapping. In order to find the depth penetration range of SC 1 channel, a topographic map of the lagoon grounds nearby Tetembia reef was performed. Some features, located in the 25-30 m range, could be detected with clear water condition. Remote sensing cannot completely replace field sampling, but helps minimise the need for costly reef survey stations. SPOT thus offers a new approach to the interpretation of bionomic and topographic features of reef environments
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