摘要
常规的三角高程测量代替三、四等水准测量,要求保证前后视距相等来消除地球曲率的影响,要求对向观测来消除大气折光影响,大大增加了外业工作量。介绍的新方法,不必保证前后视距相等,也不必进行对向观测,只利用程序进行高差改正,就能提高精度和效率。以实测数据为依据说明新方法的可靠性和高效性。
Conventional triangle elevation survey replacing the third and fourth grade leveling needs backsight distance equaling foresight distance to eliminate the influence of the earth curvature and observing bilaterally to reduce atmospheric refraction is considerable, which greatly increases field work. In the new method only using programme correcting height difference can enhance precision and efficiency. Based on actually-surveyed data, high precision and efficiency can be validated with the new method.
出处
《黑龙江水专学报》
2007年第4期67-69,共3页
Journal of Heilongjiang Hydraulic Engineering College
关键词
三角高程测量
三
四等水准
改正程序
对向观测
trigonometric height survey
the third and fourth grade leveling
correcting programme
bilateral observation
