已知一个点到一条直线的距离，主要用在地图匹配中基于权重地图匹配算法中-Given a point to a straight line distance, mainly used in the map-matching weight based map-matching algorithm

将直线型道路转化为圆形道路，实现NS模型的运动。清晰通过动态图和时空图认识NS规律-The straight road into a circular path to achieve movement NS model. NS clear understanding of the law of time and space through dynamic maps and map

车辆车道线检测，使用CANY提取轮廓，hough变换获得直线。-Vehicle lane detection, contour extraction using CANY, hough transform to obtain a straight line.