摘要
介绍了重力场模型的框架约束方法,当直接重力法模型经过已知点框架约束后,可削弱系统差,提高最终成果精度。用实测真值对重力法模型进行框架约束时,必须确定适合项目的最优空间插值法。通过对四类常用插值法的分析研究和三个实例的计算,得出依据插值要素的空间变异性和相关性,通过建立精度评估系统进行有效性评估,可以确定最优空间插值法。
First,frame restriction method of gravitational computing model is introduced.After restricted by known-points,direct gravitational computing model can diminish systematic errors.So the final precision can be improved.In order to restrict the frame of gravitational computing model using surveyed values,the spatial interpolation methods must be determined to fit to project.By analyzing four common interpolation methods and reckoning three examples,we know that establishing accuracy validity system according to the special variability and relativity of interpolated elements can determine the most effective interpolation methods.
出处
《海洋测绘》
2010年第6期15-18,共4页
Hydrographic Surveying and Charting
关键词
重力场
框架约束
空间插值法
有效性评估
gravity field
frame restriction
spatial interpolation
validity evaluation
