摘要
当在孤立点间进行控制点加密时可选择布设成无定向导线。无定向导线的粗差主要来源于孤立点的粗差、观测量的粗差和计算的粗差。孤立点粗差或计算粗差会在全长相对闭合差中表现出来,但若因孤立点本身有粗差而不加检核地被利用则会浪费大量的时间和人力,影响工程进度,即便孤立点和计算没有粗差,且相对闭合差在允许范围内,还是会出现观测量含有粗差的情况。目前,测绘专业对提高孤立点的可靠性都未提出实质性的解决方案,提高无定向导线观测量和计算的可靠性不够全面或工作量较大。本文提出通过增设"通视点"的方法,只需在增加较小工作量的情况下提高无定向导线粗差所有主要来源的可靠性,具有较大的实用价值。
When the control point encryption in the isolated points can be selected into Non - orientation Traverse. Gross Error of Non - orientation Traverse from isolated points of gross error,the ratio of gross error and calculation of gross error. Isolated points of gross error or calculation of gross error is not displayed through in relative closing errors of extreme length. But Isolated points of gross error Without the checklist is adopted,will waste a lot of time and manpower and affect the progress of works. Also according to the litera- ture, even if without isolated points of gross error or calculation of gross error, relative closing errors of extreme length also within the scope of permitted, but will still be the case of observations contain gross errors. Present in mapping professional periodicals, improving the reliability of gross error neither substantive solutions, improving the reliability of observations contain and the ratio neither comprehensive enough or large workload. Aiming to raise by the creation of ＂muter - invisibility point＂ approach , just a small increase in the workload of case, can improve the rehability of all gross error about Non - orientation Traverse, with great practical value.
出处
《测绘与空间地理信息》
2016年第1期198-199,共2页
Geomatics & Spatial Information Technology
关键词
可靠性
对边测量
后方交会
导线测量
the reliability
missing line measurement
resection
traverse survey
