大地线的反算，已知地球上的两点坐标求大地线的长度和起始方位角-Inverse earth line, known coordinates of two points on the earth seeking the land line length and initial azimuth

基于vb程序的反算坐标方位角，适合要经常转换方位角的同学-Based on inverse coordinate azimuth vb program

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