摘要
为在局域建立一个无缝垂直参考基准面,提出了两步转换的思想和方法,即从大地高到正高然后到海图高。利用该方法,构造了Saint John河高程转换模型,并在该河段建立了无缝垂直参考基准面,且得到了实际验证。
A two-step transformation, which is from ellipsoidal height to orthometric height then to chart height, is studied. For the first transformation, two kinds of methods are studied. For the step 2, a cross-section linear interpolation method is developed for ensuring these chart datums continuous variation and the transformation from orthometric height to chart height. The above studies are applied for Saint John River, and corresponding models are developed. An on-the-fly GPS tidal level measurement was implemented in the river segment for testing above models. Which proves these methods and theories are credible and feasible in actual applications.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2006年第5期448-450,共3页
Geomatics and Information Science of Wuhan University
关键词
大地高
正常高
海图基准
海图基准高程
ellipsoid height
orthometric height
chart datum
chart datum height
