基于影子坐标，计算该地点的经纬度。最后利用最小二乘法拟合得到结果。由于建立模型时把问题简单化，因此最后结果会有一定误差-Shadow Based on the coordinates, longitude and latitude of the location. Finally, the results obtained by least squares. Since the establishment of model simplification of the problem, so the final result will have a certain error