手机指南针在标准地调查中的应用研究

针对当今林业标准地调查工具滞后现象,尝试性地将手机指南针运用到标准地调查中,试图探究方位角测量新途径。采用手机重力指南针V3.1.12与哈光DQL-12Z型森林罗盘仪在标准地调查中进行精度、效率对比分析。研究结果表明,手机指南针不受森林环境的影响,在精度上,手机指南针方位角测量与罗盘仪测量误差的标准差仅为1.61°,T检验结果,两者在方位角测量误差上无显著差异。在工作效率上,结合皮尺设置25 m×25 m方形标准地,手机指南针平均完成设置时间为34 min,罗盘仪为38 min,手机指南针提高工效4 min。手机指南针数字化读数快捷,携带与操作简便,采用固定支架并安装瞄准装置可替代罗盘仪成为标准地调查信息化、数字化工具。

Application of Compass of Mobile Phone in Survey of Sample Plots

This paper attempted to explore a new way of azimuth measurement by using the compass of mobile phone in the survey of sample plots in view of the lagged forestry survey tools.The comparison and analysis for the precision and efficiency of gravity compass V3.1.12 and HAGUANG forest compass DQL-12Z showed that the standard deviation of mobile compass which was not affected by the forest environment was only 1.61°with that of forest compass on the azimuth measurement error,and both of them had no significant difference according to the T test.In terms of working efficiency,the mobile compass took 34 min to set a sample plot of 25 m×25 m which improved by 4 min compared with the forest compass that took 38 min.The mobile compass was fast for digital reading and easy to carry and operate,adopted fixed bracket and equipped with aiming device,which could replace forest compass as the information and digital tool for sample plots survey.