摘要
POS辅助航空摄影直接地理定向法(direct georeferencing,DG)得到的外方位元素,可直接进行小比例尺成图,省去了地面实测环节,大大提高了工作效率。但DG法对地面基站、检校场要求较高,而在实际作业中会出现某些环节的数据缺失。针对这些情况进行实践研究,结果表明,可用精密单点定位技术(precise point positioning,PPP)代替地面基站,利用其他架次的检校场数据检校,检校场对同向飞行的航线检校精度更高。
Direct georeferencing(DG) of aerial photography based on POS system can meet the needs of small scale mapping accuracy,eliminate the measuring of ground control point,greatly improve work efficiency.However,application of DG requires a higher on the ground observation station,calibration field and some other aspects.But influenced by objective factors some data would missing.After practice research,the results show that when there is no ground station data,it can be instead by precise point positioning.There is no calibration field data,it can use other flight's calibration data,calibrate the routes in the same direction have higher calibration accuracy.
出处
《地理空间信息》
2015年第2期83-85,97,共4页
Geospatial Information
基金
国家测绘地理信息局与航遥中心合作研究资助项目(2010324)
