DWG矢量数据在长沙独立坐标系与国家坐标系之间互转的实现

在测绘生产和GIS数据应用中,坐标系的互相转换是经常遇到的问题。本文通过分析、研究长沙独立坐标系和国家坐标系之间的关系,找出了两者之间互相转换的有效途径及其转换参数的求解方法,并以DWG矢量数据的转换为例,提出了矢量数据在不同坐标系之间互相转换的技术思路、实现方案及其关键技术,实现了矢量图形数据在长沙独立坐标系和国家坐标系之间的整体变换。

Coordinate Trans Formation of DWG Vector Data Between the Changsha Indepentent Coordinate System and CGCS2000

In the surveying and mapping production and application of GIS data,coordinate system transformation is that we often encounter problems.Through analyzing and investigating the relationship of the Changsha independent coordinate system and national coordinate system,the paper finds out the effective way of converting them.With the converting of DWG vector data for example,the paper puts forward the idea of vector data converting,the implementation and the key technology coordinate between the two coordinate systems.The overall converting of vector data can be done between the Changsha independent coordinate system and national coordinate system.