ADS40数字摄影测量中的DLG数据坐标转换

摘要

探讨了ADS40数字摄影测量中的DLG测图数据的坐标转换,水平方向上,放弃通用软件中的七参数转换方法,而直接采用投影参数转换,垂直方向上,采用格网模拟似大地水准面精化成果,建立起严密的转换关系.同时,将转换关系与DLG数据生产紧密结合,简化了作业流程,提高作业生产效率.%Coordinate conversion of DLG data based on ADS40 digital photogrammetry is discussed. Direct project parameter conversion instead of seven-parameter conversion is adopted in horizontal direction. A grid model is adopted to simulate geoid refinement and the strict conversion relationship is created. At the same time, the conversion relationship is tightly combined with the DLG data production. The work flow is simplified and the production efficiency is increased.