基于多参考椭球的坐标转换程序实现

工程测量中仍广泛采用高斯投影，其分带投影的方法使得实际工作中经常遇到坐标不统一情况，需要进行正反算及换带计算。控制高斯投影产生的长度变形及确保坐标的单值性仍是需要解决的问题。本文根据高斯投影理论及特点，并充分考虑高斯投影产生长度变形的影响，在Visual Basic平台上开发了坐标正、反算程序及换带计算程序。通过程序自身验证和程序交叉验证，结果表明计算精度能保持在毫米级，确保了坐标的单值性，且操作简便，具有一定实际应用推广价值。

The Development of Coordinate Conversion Program Based on Multi-reference Ellipsoid

Gauss projection is still wide used inn engineering survey. Its projection method makes the actual work situation often require coordinate transformation and band change. Controlling length distortion and a single value of the coordinates point still need to be solved in calculation process. Based on the Gaussian projection theory and the length of deformation, we developed positive and negative counting procedures and band change procedures in Visual Basic platform. Through the program self-validation and cross-validation with Trip software, the procedure is accuracy, reliable and ensuring coordinate single value which is easy to operate. It has a certain practical application value.