摘要
导线网在桥梁施工控制网的加密测量中得到广泛使用,由于存在两类不同性质的观测值以及导线边长度不等的问题,平差时应当考虑边角观测值权的统一和不同观测边权的合理取定。本文结合某特大型桥梁加密控制测量的实际情况,对跨江导线网中边长相差较大等问题,采用Helmert方差估计方法分析平差过程中权的合理取定问题,明显地提高了平差结果的精度。
Traverse network in the densified survey of bridge control network are used widely. In addition to traverse side with different length, there are two kinds of observation value. So we should consider the unification of the weight of the triangulateration observation value and the selection of different observation side during the adjustment. In this paper, the authors applied the Helmert method to analyze the properly selection of the weight to solve the problem of side length discrepancy relatively greatness during the adjustment, and the precision of the adjustment result can be improved obviously.
出处
《测绘与空间地理信息》
2006年第2期111-112,118,共3页
Geomatics & Spatial Information Technology
关键词
跨江导线网
定权
Helmert方差估计
traverse network crossing the river
fix weight
Helmert variance estimation
作者简介
李斌（1981-）,男,硕士研究生,河海大学土木工程学院测量工程系,研究方向为精密工程测量.
