森林资源清查中罗差的测定与计算  

Measurement and Calculation of Compass Errors in Continuous Forest Inventory

作　　者：李轶涛 

机构地区：[1]山西省林业调查规划院,山西太原030012

出　　处：《山西林业科技》2015年第4期1-4,共4页Shanxi Forestry Science and Technology

摘　　要：森林资源连续清查野外工作中,罗差是样地复位的重要测量指标。笔者从理论分析到实例示范2方面研究了罗差的测定与计算。通过分析罗盘仪在样地复位中的作用和对罗差的影响,表明即使轻微的罗差错误也能导致样地边界位移,出现多测木、漏测木。通过编制电子工作表实现了罗差计算的简便操作。为在森林资源清查工作中正确测定罗差,提高测定效率提供了有力的技术支持。Compass errors were important index for sample plot resetting in field continuous forest inventory. Measurement and calculation of compass errors were studied from theoretical analysis and example demonstration. Analyzing the function of compass in resetting sample plot and influence of compass errors,little compass errors could lead to sample plot boundary displacement,extra trees,missing trees. Easy operation of compass errors calculation was achieved by establishing spreadsheets that provided strong technology support for correct measurement compass errors and improving measuring efficiency.

关 键 词：罗差 罗盘仪 磁方位角 磁坐偏角 森林资源清查 

分 类 号：S758.5[农业科学—森林经理学]