隧(巷)道测量瞄准误差与觇标选取  

SIGHTING ERROR OF TUNNEL SURVEYS AND THE SELECTION OF TARGETS

作　　者：何泽平[1] 

机构地区：[1]重庆三峡学院,重庆404000

出　　处：《四川测绘》2001年第1期30-31,共2页Surveying and Mapping of Sichuan

摘　　要：根据隧 (巷 )道双次观测值的统计资料 ,分析觇标对瞄准误差的影响 。Based on the statistics of the double observing date of tunnel surveys,the paper analyses the targets affect sighting errors and points out the ways of the selection of targets and the questions needed to attention in observing.

关 键 词：隧道测量 照准误差 觇标选取 水平角 井下测量 J2型经纬仪 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]