Abstract
Shorea glauca or locally known as Balau Laut has been listed in Malaysia Book of Records in 2016 as the tallest tree ever planted with height of 72.4 meter. The tree was found in FRIM Selangor Forest Park (FRIM-SFP) tropical rain forest. In addition, there are other tall trees found within FRIM-SFP. However, tall trees are always exposed to lightning strikes that eventually damage and may lead to mortality of the trees. Therefore, it is important to identify these tall trees for conservation purposes. Conventional approach which is ground survey requires a lot of man power and time consuming due to wide forest area. The topographic condition also could hinder the survey. This study used canopy height model (CHM) and incorporate it with 3-dimensional structure of LiDAR point-cloud to improve individual tree detection. The location of tall trees were mapped. The finding showed that most of the tall trees are clustered in eight spots and a few found isolated from other tall trees. The CHM were then overlaid with soil map and Digital Terrain Model (DTM). The result showed that the first two tall trees and 36 trees of 60-65m height class are grown in Tai Tak soil series in hilly area with slope 16-25°.
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