gps技术在交通工程应用中的若干问题研究-交通运输规划与管理专业毕业论文.docx

东鹰大学蟥士学链论文 攘要
Abstract
Nowadays,large amounts of fund is poured into the construction of basic transportation infrastructure and the technical difficulties of projects are has brought new demands for surveying:quicker speed,less investment and higher accuracy,One of heated discussions in present surveying field is how to satisfy these new demands of engineering construction timely,how to resolve some new problems that Occur in the application of GPS
surveying and how to exert the advantages of GPS as much as possible.
Due to the problems that arise in the application of GPS technology in the construction of basic tran8portation infra8tructure。the author researches and discusses several fo!lowing facets:Firstly,according to the error character of GPS,the author brings
forward two kinds of methods to improve the accuracy of the first~calculated point;He simply approaches the problem that is how to choose GPS baselines in 3D unengaged ,the author introduces several methods for the coordinate transformation and puts forward a method that be used to calculate transformation parameters bining of order to we氇ken the influence of the grOSS error of eo黼on points,the author introduces robust estimation and reconstructs it to coordinate
,the author constructs effective projection region by exerting functions and discusses the choice of the best projection surface and th , the author mends the principles and methods of RTK technology and summarizes surveying accuracy of RTK technology ,the author discusses a method of acquiring height-anomaly in surveying height of GFS addition,the author analyses the accuracy of GPS height by means of experiment and general ize SORe useful
conelusiOIIS.
Key words:GPS,the first—calculated point,coordinate transformation,robust estimation, effective projection region、projection surface、ellipsoid、RTK、GPS height.
薹薹
袭南