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Cupressus sempervirence var. horzontalis belong to Cupressus family. This species is specific evergreen within an elevation range of 290 meters and 1200 meters above sea level and grows in the arid and semi-arid climate regions in the North of Iran. This species is one of the worthiest species that can be found in the special soil background in central area of Alborz Mountain in the North of Iran. High spatial resolution satellite imagery has become an important source of information for geospatial applications. In this paper, we used ALOS data, including multispectral band (AVNIR-2) with 10-meter resolution and Panchromatic band (PRISM) with 2.5-meter resolution to make land cove classification. Sample plot area about 900 ha incorporating 15 sub sample plots have been choose whit 9 ha (300 x300m) equal to 120 x 120 pixels for this research have been selected. On the following procedure, ground control data to be evaluating the above methods have been measured. Our method of counting tree density was useful for estimation of biomass enabling better decision making for natural resource managers in fields of environmental. The result of these analyses should be seen. (C) 2011 Published by American Applied Sciences Research Institute