一种关于图幅改正量坐标转换算法的实现方法

A Method for Realizing the Mapsheet Correction for Coordinate Transformation Algorithm

如何处理转换参数的存储与查找是实现使用图幅改正量算法对地理数据进行坐标转换的关键问题。本文通过分析图幅改正量参数的固有特性,提出了一种利于快速搜索目标参数的编码方式,进而利用这一编码方式对原始参数进行重新编码预处理后得到系统后续所使用的参数文件。基于重编码的参数,提出了快速查找待转换图幅的端点编码算法,从而实现了待用参数的快速查找。结合图幅改正量算法的具体实现,本文提出了一套完整、可行的图幅改正量算法实现方案。

How to deal with the storage and query of correction parameters is a key issue to realize the coordinate transformation of geographic data using mapsheet correction algorithm.This paper analyzes the inherent characteristics of the correction parameters of the mapsheet correction,proposes a coding method that is conducive to the quick query of target parameters,and uses this coding method to recode the original parameters and obtain the parameter’s files used by the software system.Based on the recoding parameters,a quick query algorithm for the end points of the mapsheet to be transformed is proposed.Combining with the specific realization of the mapsheet correction algorithm,this paper proposes a complete and feasible implementation scheme of the mapsheet correction algorithm.