透视变换,由于摄像头存在透视效果 所以很多时候需要进行世界坐标系和图像坐标系下的转换-perspective transformation, As the camera lens effect so there is often the need for the world coordinate system and the image coordinate system conversion

用于测量与地图制图的高斯投影转换，提供了北京54、全国80、WGS84三个坐标系下的正算、反算。输出结果精确到小数点后7位。-for measuring and mapping the Gauss projection conversion, the Beijing 54, 80, three WGS84 coordinates the count is, anti-counting. Output accurate to seven decimal places.

MFCGPS用来根据卫星星历计算任意时刻卫星在WGS84坐标系下的坐标。Foudation of surveying adjustment 用来计算摄影测量中影像外方位元素。Linklists是C++的动态链表，支持任意数据结构，Foudation of Geodesy 是一个用来进行高斯坐标和地理坐标相互转换的程序。GDAL用来读取遥感影像数据，设计界面和ENVI软件相似-MFCGPS any moment of the satellite coordinates in WGS84 coord

卫星的轨道控制，产生卫星的轨迹，对卫星的坐标系进行转换-Satellite orbit control, satellite-generated trajectory, the satellite coordinate system conversion