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影响水准测量成果的主要因素有哪些?如何减少或消除?

问答题
2022-04-02 21:52
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正确答案
1、仪器误差:仪器校正不完善的误差、对光误差、水准尺误差。消除方法:前后视距相等,仪器严格检验,正确使用。 
2、观测误差:整平误差、照准误差、估读误差、扶尺不直误差。消除方法:使用高倍望远镜,认真操作。 
3、外界条件的影响:仪器下沉的误差、水准尺下沉的误差、地球曲率和大气折光的影响。消除方法:前后视距相等,使用尺垫。

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