给出两个点的BLH，以这两个点给一条边，以给定长度为宽，求定矩形另外两个点的BLH。 里面应用到了高斯投影的运算，及DLL控件的调用等。-Are given two points BLH, one of these two points, to edge to a given length of wide rectangular order to set the other two points of BLH. Which applied to the Gauss projection op

坐标转换(BLH->LYZ )

包括大地坐标与三维直角坐标系的互相转换两个程序-Including the transform of the geodetic coordinates and three-dimensional Cartesian coordinates

坐标系转化函数，从地心地固坐标系到大地坐标系-translate the coordination, ECEF to BLH

卫星导航定位中的坐标系转化函数，从大地坐标系转化到ECEF坐标系-coordination translate function in satellite navagation,form BLH to ECEF