抄録
Using a digital height data of the tropical swamp peat forest trees which were derived from aerial stereophotos taken from a cabled balloon, we estimated the height and the brest bight diameter of every tree, then, we estimated the biomass per hector above the ground in the tropical swamp peat forest. Comparing it with the data from a literacy, it differed about 3% from the biomass data estimated by Hara and suzuki (1997) . As a result of this research, we conclude that the usage of low altitude stereo aerophotographs are useful for the estimation of the biomass above the ground in the dense natural forest of which deeper part we can not easily access into and we need some technical improvements for it.
