Rational classes and technological standards of elementary EDM traverse are demonstrated. The precision reliability of kinds of traverses are proved by appraising precision.

• 针对《城镇地籍调查规程》和《城市测量规范》对光电测距(dm)线技术参数规定的不同,对低等光电测距导线的合理等级及各等级导线的技术标准进行了研究,并通过精度估算证明了各级导线精度的可靠性。