我自己做的“等面积切方位投影”小程序，用MFC实现等面积切方位投影-I do "all round projection area of" small procedures, such as using MFC area cut Projection

根据所给的江苏省境界数据 – 显示并计算江苏省十三个地市的面积 – 编写墨卡托投影反算程序，转换上述数据为经纬度坐标，并显示 – 根据地球椭球体表面上的梯形面积计算方法，基于经纬度坐标计算江苏省十三个地市的面积-According to the data given in the realm of Jiangsu Province - Display and calculate the thirteen cities in Jiangsu Province, an area