格网法在2000国家大地坐标系基准转换中的关键技术

Key Technique Study of Grid-Based Method in Datum Transformation of China Geodetic Coordinate System 2000

为解决平面和高程系统的基准转换,对双线性内插模型进行研究,以2000国家大地坐标系转换为例,以1∶1万标准格网改正为基础建立规范模型,应用模型解决了基准转换结果的唯一性和坐标转换参数的保密性要求,在基准转换中有推广价值。

In order to achieve the different coordinate systems and height datums transformation,this paper studies the bilinear interpolation model.The datum transformation of China Geodetic Coordinate System 2000 is used as an example to build a normative model based on the correction of the scale 1∶10 thousand standard grids.This model can ensure the uniqueness of datum transformation result and meet confidentiality requirements of coordinate transformation parameters,thus has promotion value.