Real-time-road-condition-based congestion point determination method

The invention discloses a real-time-road-condition-based congestion point determination method. The method comprises: a city or a regional range needing to obtain road condition is determined and a needed map level is selected; a download time interval is set, map slices are downloaded and splicing and storing are carried out, thereby forming a real-time road condition map; the real-time road condition map is guided into a geographic information system to carry out road network vectorization; the vectorized road network is broken into points and stored real-time road condition coloring matter information is assigned to discrete points; according to a traffic flow direction, a topological relation between the discrete points is constructed; and on the basis of space-time differences between secondary congestion and primary congestion, a congestion point determination criterion is constructed and a spatial visual congestion point map is obtained. According to the method provided by the invention, a congestion s