Classification and mapping of landscape of Truong Sa Islands, Vietnam at the scale of 1:250 000
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Abstract
Marine landscapes study is a new direction of modern geography, formed and developed in Western countries and Russia and other countries. In Vietnam, research on marine landscapes is still very limited. On the basis of clarifying the concept, applying remote sensing — GIS and complex field methods, a classification system has been established and a landscape map of the Truong Sa Islands has been drawn at a scale of 1:250 000. The study area includes 1 system, 1 sub-system, 4 classes, 7 sub-classes and 20 landscape types. The highest diversity is the marine landscapes, with 3 classes, 6 sub-classes and 19 landscape types. The island landscape class only includes 1 landscape type of tropical island vegetation. The offshore shallow marine landscape class (0–200 m) covers a small area but is differentiated, consisting of 2 classes (50 % of the total classes) and 9 types (45 % of the total types). The landscape of tropical islands is strongly changed in both solid vegetation cover and hydrological regime, in which many entities have soil cover, and a mixed vegetation of both continental and island flora. The landscape of the offshore shallow sea, especially 100 m uppermost layer, is mainly composed of corals and other reef organism groups. The landscape structures of the Truong Sa Islands represent not only the characteristics of their constituent components but also the dynamics of the landscape, especially in the marine domain.
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