针对沈阳市地铁新、旧线路横跨两个坐标系统问题,笔者对同一套边长观测数据分别进行北京54、西安80两套坐标系统边长改化、平差,均取得良好成果,使地铁新旧控制成果可在54、80系统间随意比对,为地铁的旧点校正、安全贯通奠定了基础.%Based on the new and old metro systems in Shenyang which cross two coordinate,the paper conducts the length adjustment of Beijing 54,Xi'an 80 coordinate system respectively for the same side length,which achieves the good results,so that the new and old control results can be compared to the subway in 54 and 80 systems which lays the security foundation for the old subway correction.
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