THREE-DIMENSIONAL POSITION BY TWO-POINT INTERSECTION INVOLVING TWO VERTICAL ANGLES

Position technology has taken important roles in forestry, and the new challenges have presented to us because of the expanse, obstruction and amplitude of forestry fields. In view of the economy and practicality,an effective method of three-dimensional position by two-point resection involves two vertical angles is discussed in this paper. The characteristic is that we set up the instruments on unknown point for once, observe three parameters including two vertical angles and one horizontal angle. It has less measure mental data than common methods, and it can solves the position difficulties of sight line in forestry fields. The mathematical modes have been proved in this paper and the precision has been analysed based on the examples.