是一个应用高斯投影面进行正算反算的大地程序，对于地球学科的人有很大的帮助。-application is a Gaussian projection is for the anti-counting procedures for the counting of the earth, earth science who is a great help.

反投影 反投影 反投影 反投影 反投影 -back 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

基于matlab的平行束滤波反投影重建算法(Back projection reconstruction algorithm of parallel beam filter based on MATLAB)