我们提出一种新的算法计算从多边形曲线到平面图的离散Frechet距离，并用它建立起以上所述的对应关系以及消除投影的偏差，数据的仿真结果表明这种新的方法的有效性-we have developed a new algorithm to compute a discrete Frechet distance　a polygonal curve to a planar map, and use it to automatically

establish the above correspondence and remove the projection bias. Simulations with synthetic data show the efficacy of this innovative approach.