Through the actual measurement,the differences of precision between some methods which are commonly used in construction lofting are compared,ranging from horizontal position to elevations position. Explores the treatment methods for the measurement data. The results can give reference to the similar engineering and is convenient for application in practical engineering.%通过实际测量，分析比较了几种常用的放样方法在放样点平面位置及高程位置时的精度，并探讨了测量数据的处理方法，得出的结论对施工放样实践工作有一定参考意义。
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