这是测绘专业使用的自己编的大地主题解算和高斯正反算，精度很高哦，界面很大气，简洁。如果哪位测绘学子不想编正反算代码完全可以复制过去的。-This is the specialty of Surveying and mapping using own geodetic solution and positive and negative on Gauss, precision is very high Oh, the interface is very atmospheric, concise.