车载移动测量系统高程异常改正在道路改扩建中的应用

Research on Elevation Anomaly Correction of Vehicle-borne Moving Surveying System in Road Rehabilitation

通过道路改扩建可以优化现有道路路网结构,将车载移动测量系统引入道路改扩建中,可以降低测量成本、提高工作效率。但车载移动测量系统受定位方式的影响,获取的高程为大地高,其需要转化成正常高才能应用于工程项目的施工中。为了发挥车载移动测量系统在道路改扩建中的优势,本文选取目前常用的几种高程异常改正方法,并结合实际工程应用,在保证效率的前提下,分析各种方法在该区域内的内符合精度和外符合精度,寻找适合该区域的高程异常改正方法,从而发挥车载移动测量系统的优势。

Through road rehabilitation, the existing road network structure can be optimized, and the vehicle-borne moving surveying system can be introduced into the road rehabilitation, which can reduce the cost of measurement and improve the efficiency of work.However, the vehicle-borne moving surveying system is affected by the positioning mode, and the elevation of the system is geodetic height, and it needs to be converted to normal height, so it can be applied to the construction of the project.In order to give full play to the advantages of the vehicle-borne moving surveying system in the road rehabilitation, this paper selects several methods of elevation anomaly correction which is commonly used at present, and combines the practical engineering application.On the premise of guaranteeing the efficiency, this paper analyzes the internally coincident precision and the externally coincident precision of various methods in this area, and seeks the elevation anomaly suitable for this area.The correction method can give full play to the advantages of vehicle-borne moving surveying system.