摘要
为解决森林调查中罗盘定位的精度问题,利用全站仪具有测量边长和角度精度高的特点,将其测量值作为真值.用罗盘仪对其值进行重复观测,进行比较研究,通过间接平差,得出罗盘仪测量边长和竖角的精度,由此推导出罗盘导线和罗盘测树高的精度.试验表明,1 km罗盘支导线最弱点的中误差达3 m,罗盘测树高的相对精度达5%.这个精度能够满足林业上的测量要求.由此可见,用罗盘进行辅助定位,是一种理想手段.
In order to promote the precision of positioning of compass in forest survey,the authors take the measured values from total station as true values,for the total station has the features of high precision in measuring distance and angles.Carrying out a comparative research between the data from total station and the data from compass,which is accumulated through many observations,with the analytic tool of adjustment of indirect observations,we could get the precision of distance and vertical angles using compass.Experiments demonstrate that the relative precision of tree height is 5%,while in 1 km of compass traverse,the mean error of the worst point position is only 3 m.The precision of these data can satisfy the requirement for precision in the application in forestry.A conclusion is made that taking compass as an auxiliary positioning tool is an ideal means of promoting the precision of measurement in forest survey.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2005年第S2期182-186,共5页
Journal of Beijing Forestry University
基金
"863"国家高新技术项目(2003AA245030)
国家自然科学基金项目(90302014)
北京市自然科学基金重点项目(4041002)
关键词
罗盘
导线定位
精度分析
误差
compass,positioning of traverse,precision analysis,error
