基于VB的2000国家大地坐标系坐标转换程序的实现

Realization of coordinate conversion program in China geodetic coordinate system 2000 based on VB

针对目前2000国家大地坐标系下矿山测量坐标转换应用软件普遍较少情况,利用VB6.0平台开发了2000国家大地坐标系下包括高斯正反算和换带计算功能的坐标转换程序。通过代码调试和数据计算验证可知,高斯正算和换带计算均为毫米级及以下精度;高斯反算时求Bf直接法优于迭代法,反算精度不低于0.000 1″。通过坐标转换精度分析可知,程序满足2000国家大地坐标系下矿山测量中坐标转换精度应用需求。

Aiming at the insufficiency of mine surveying coordinate conversion software in China Geodetic CoordinateSystem 2000, the paper, based on VB6.0 plat, develops computing coordinate conversion program of China Geodet-ic Coordinate System 2000 including positive Gaussian calculation, inverse Gaussian calculation and calculation toconvert projection zone. The code debugging and coordinate data calculating show that the positive Gaussian calcula-tion and the calculation to convert projection zone are realized within millimeter precision. And the direct method isbetter than iteration when calculating Bf with inverse Gaussian calculation whose inversing accuracy is up to 0. 0001.The coordinate conversion accuracy analysis shows that this program is satisfied Mine Surveying coordinate conversionapplication requirements in China Geodetic Coordinate System 2000.