全站仪无棱镜模式在岛礁地形测量中的应用

针对岛礁地形测量的特点，提出了用全站仪无棱镜模式进行碎部点数据采集的方法，从理论上对其精度进行了论证分析，通过公式推导、数据图表分析，得出了全站仪无棱镜模式测定待定点位平面位置精度和点位高程精度与所测距离和天顶距之间的关系。同时通过全站仪的无棱镜模式和有棱镜模式对所选碎部点进行检核，实验数据结果表明都能完全符合规范的要求。

Application of Total-station Without Prism Mode in Topography Survey of Island

According to the characteristics of topographic survey of island, the data collection mode of detail points by using total-station without prism is presented in this paper. The precision is discussed and estimated theoretically. The relationship between the precision of plane position and height and the azimuth is obtained in the island topographic survey by total-station without prism mode through formulas, data and graph. The case study of topographic survey with and without prism mode shows that the method is simple and feasible to satisfy the mapping requirement.