摘要
定位技术在林业工作中起着重要的作用,同时,由于林地的广阔、闭郁及交通不便等特点又给定位工作提出新的要求。从经济性和实用性出发,本文讨论一种加测倾角的双点后方交会三维定位方法。其主要特点是只在待定点上安置1次仪器,对2个已知点观测3个参数,即2个竖直角和1个水平角。与常用的前方交会、后方交会定位方法相比,其观测数据少,同时,解决了林区定位通视条件差给定位工作带来的困难。对相关三维后方交会的数学模型进行了推证,并根据实例进行了误差分析。
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.
出处
《河北林果研究》
2004年第2期118-122,共5页
Hebei Journal of Forestry and Orchard Research
基金
国家863项目(2001AA245031)
国家973项目(2002CB111502)资助。
关键词
三维后方交会
倾角
定位
精度评定
Three-dimensional Resection
vertical angle
position
precision
