高斯投影正算程序，实现经纬度坐标转换为平面直角坐标的功能。提供了交互式选择的三种转换方法，交互式输入中央子午线。-The Gauss Projection is counting procedures to achieve the function of latitude and longitude coordinates to Cartesian coordinate plane. Three conversion method provides interactive selection, interactive input from the central meridian.