低空GPS辅助空中三角测量精度分析  

Accuracy Analysis of Low Altitude Airborne GPS-Supported Aerotriangulation

作　　者：王瑜 周松 高文涛 汪燕 WANG Yu;ZHOU Song;GAO Wentao;WANG Yan(The Third Geodesy Institute,Ministry of Natural Resources,Chengdu 610100,China;The Third Geographic Information Mapping Institute,Ministry of Natural Resources,Chengdu 610100,China)

机构地区：[1]自然资源部第三大地测量队,四川成都610100 [2]自然资源部第三地理信息制图院,四川成都610100

出　　处：《测绘与空间地理信息》2019年第12期190-192,共3页Geomatics & Spatial Information Technology

摘　　要：常规低空摄影测量方式获取的成果高程精度偏低,不能满足1∶500地形图的高程要求。本文以覆盖地面约55 km2的1 965张低空航片构建一个加密网,进行了8像控点空中三角测量、GPS辅助的8像控点空中三角测量、GPS辅助的40像控点空中三角测量,并以106个未参与平差的野外实测点为检查点,将立体采集坐标与野外实测坐标进行了比较与分析。结果表明,使用GPS辅助空中三角测量可获得平面、高程精度均满足1∶500 DLG要求的加密成果,对于采用低空摄影测量方式解决大面积1∶500地形图的高程问题具有较大借鉴参考价值。Low elevation accuracy always occurs in 1 ∶ 500 topographic mapping with the method of Regular low altitude photogrammetry. In this paper,an strip network which covering about 55 km2 is constructed with 1 965 low altitude aerial photographs,and then,the aerotriangulation of 8 control points,GPS-supported aerotriangulation of 8 control points,GPS-supported aerotriangulation of 40 control points are separately carried out. In order to validate the accuracy,we got and compared 106 unused points’ coordinations independently by field and stereoscopic measure. The result shows that the method of GPS-supported aerotriangulation can be used to get the encryption results whose plane accuracy and elevation accuracy can meet the requirements of 1 ∶500 Topographic Mapping,and then provides a valuable reference to solve the low elevation problem of 1 ∶500 Topographic Mapping with low altitude aerophotogrammetry.

关 键 词：低空 GPS辅助 空中三角测量 

分 类 号：P224.2[天文地球—大地测量学与测量工程]