Based on actually-surveyed data, an analysis on the precision of infrared distance triangulated heliograph survery was done according to law of propagated error.

• 以实测数据为依据，按误差传播定律对红外测距三角高程测量的精度进行了分析，提出了在一定距离范围内红外测距三角高程测量能够代替三、四等水准测量。