DMCⅢ数字航摄仪在常益长铁路断面采集中的应用  

The Application of DMCⅢ System for the Cross Section Survey in Chang-Yi-Chang Railway Project

作　　者：柯舒 Ke Shu(China Railway Siyuan Survey and Design Group Co,. LTD, Wuhan, Hubei 430063, China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《铁道勘察》2019年第2期14-17,共4页Railway Investigation and Surveying

摘　　要：为了提高铁路断面采集效率,提出基于DMCⅢ数码影像立体采集断面的方案,并成功应用于常益长铁路定测。外业以区域网方式布设像控点,内业通过空中三角测量建立测区立体模型,对影像进行匀光、匀色预处理并适当增加高程控制点数量,以提高模型精度,最后通过实测中桩坐标检核模型,进行断面的立体采集工作。实验证明,基于该方案立体采集的断面精度能够满足铁路勘察定测设计需求,特别是在地物复杂区域,如城区、站场等,基于高精度的DMCⅢ数码影像立体像对可准确快速地采集铁路断面,减少大量的外业测量工作,在保证精度的前提下大大提高了铁路勘测效率。To improve the efficiency of railway survey,this paper presents the scheme of cross section survey based on the DMCIII system and discusses a successful application case of location survey in Chang-Yi-Chang Railway. In the field work, the photograph control points are set with network method, and in the indoor work of aerial triangulation, the cross section could be measured with the stereoscopic models. Some strategies such as image dodging or adding vertical control points could further increase the precision of the model, and the measured coordinates of center-stake could be used to check the model and assist stereo cross section survey. The application experiments demonstrate that the stereo measuring of cross sections is qualified to satisfy the accuracy requirement of location survey and design, especially in the areas of intensive construction and complex terrain, such as downtown and station yard. Overall, based on the stereoscopic models, the cross section could be collected accurately and fast;in other words, this method could not only meet the accuracy requirements, but also increase the survey efficiency obviously.

关 键 词：DMCIII数字航摄仪 铁路断面 GSD 外业控制测量 空中三角测量 

分 类 号：P258[天文地球—测绘科学与技术]