摘要
在悬空管线测量中 ,对于管径大、悬空高的管线 ,用普通三角高程法测量很难满足精度要求 ,而用切线法测量则很容易达到精度要求。对于控制点成为孤点的地区 。
When surveying major diameter and higher hanging pipeline, common trigonometric leveling can't meet precision requirement, but tangent method surveying can meet precision requirement. In the areas where control-points become alone, we can survey the relief map by no backsight surveying method.
出处
《太原科技》
2001年第3期31-31,33,共2页
Taiyuan Science and Technology
