摘要
本文提出利用江河每边岸上相邻水准点间的高程异常差进行ＧＰＳ高程拟合，避免了两岸未统一高程系统对拟合参数的影响，经虎门大桥实验验证，在海面宽３ｋｍ多的两岸上获得的高程系统差的精度满足特大型公路桥梁的高程控制要求，这对沿海平坦地区的铁路桥梁跨河水准测量都有参考作用。
Using difference in height anomaly between neighbouring benchmarks separately located on the left and right banks of a river, a new fitting method is proposed in this paper. The fitting parameters are able to avoid the influence from the discrepancy of vertical datums between two river banks. Through the test of Humen Bridge, the accuracy of calculated vertical datum difference between two banks over 3 km apart can meet the need of the extra long highway bridge vertical control. These researches would be helpful to railroad bridge crossoverriver leveling in coastal plains.
出处
《测绘学报》
EI
CSCD
北大核心
1998年第3期217-223,共7页
Acta Geodaetica et Cartographica Sinica
基金
广东省交通厅1995年度科技项目
