RTK和普通相机自主绝对定向的碎部测图方法  

Study of detail mapping method based on independent absolute orientation with GPS RTK and ordinary camera

作　　者：高珅 胡庆武[1] 艾明耀[1] 陈智鹏[1] 

机构地区：[1]武汉大学遥感信息工程学院,武汉430079

出　　处：《测绘科学》2017年第1期107-112,123,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41271452)

摘　　要：针对近景摄影测量影像立体测图中需要物方控制点并对其分布要求高,以及GPS RTK碎部测图无法解决GPS信号不佳处的测量问题,提出一种将GPS RTK和普通相机相结合的联合碎部测图技术。利用GPS RTK与近景相机相对位置关系及GPS RTK三维坐标来计算相机摄站坐标,降低了测量过程中获取拍摄中心位置信息的难度;利用相邻像对中GPS RTK标靶中心像点坐标,对相邻像对进行绝对定向,有效避免了测量过程中对控制点的依赖性。实验结果表明:该技术碎步点测量精度优于10cm,可用于GPS信号遮挡区域的城市大比例碎部测图,并较传统的碎部测图具有更高的效率,具有广阔应用前景。Aiming at the problem that image stereo mapping in close-range photogrammetry generally needs control points whose distributions are also highly required,and that detail mapping with GPS RTK can＇t measure smoothly at the places where GPS signals are limited,a detail mapping technique combined with GPS RTK and ordinary camera has been proposed in this paper.The difficulty of getting the photogrammetric coordinates of the camera can be reduced when using the 3Dcoordinates of GPS RTK and the relative position relationship between GPS RTK and the close-range camera to calculate the photogrammetric coordinates.It can also effectively avoid the dependence on control points in the measurement by using the absolute orientation of close-range images with picpointed coordinates of the GPS RTK target center in the image pairs.The results show that the measurement accuracy is less than 10 cm,so it can be applied to urban large scale detail mapping in the areas that GPS signals are limited,and has higher efficiency than traditional detail mapping.Based on the above,it has broad application prospects.

关 键 词：近景摄影测量 GPS RTK 绝对定向 碎部测图 前方交会 

分 类 号：P208[天文地球—地图制图学与地理信息工程]