问题详情

影响水准测量成果的主要因素有哪些？如何减少或消除？

时间：2022-04-02 21:52 关键词：东北林业大学土木工程专升本测量学平时作业2

答案解析

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。 <br/>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。 <br/>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。<br>

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