A road network change detection method

Abstract

The invention provides a road network change detection method, and belongs to the technical field of intelligent transportation. The method comprises the steps of: step S01, collecting vehicle trajectory data points, and sorting the same according to a time sequence; step S02, calculating a difference value between the two adjacent vehicle trajectory data points in time, determining and retainingthe vehicle trajectory data points of intersection turning; step S03, performing clustering on the vehicle trajectory data points of intersection turning to identify an urban intersection and an intersection type; and step S04, comparing the intersection information obtained in the step S03 with the intersection information on a map, and when it is determined that a new road or a disappearing roadexists, sending a road change signal to a surveying and mapping department terminal, so that the surveying and mapping department terminal updates the road network map. According to the road networkchange detection method provided by the invention, the detection information is comprehensive, new roads can be discovered, and disappearing roads can also be discovered, so that real-time detection of road network changes is really achieved.

Description

technical field [0001] The invention belongs to the technical field of intelligent transportation, in particular to a road network change detection method. Background technique [0002] The update cycle of electronic maps is generally longer, such as the electronic map of GOOGLE Figure 1 Generally, it is only updated once a year, and Baidu Map can be updated every six months, but this is far from meeting the needs of users. As we all know, the speed of urbanization in China is accelerating, and roads are updated frequently. New roads are constantly being put into use. At the same time, due to regional planning or real estate development, some roads will disappear. However, the traditional map road network update method requires the Institute of Surveying and Mapping to send special detection vehicles to the urban road network for detection. This method takes a long time and requires a lot of manpower. Some scholars have also proposed to obtain new roads by processing satel...

AI Technical Summary

Problems solved by technology

However, this method first needs to go through a complex vehicle-road matching algorithm (that is, trajectory-to-road matching), and at present, it can only find new roads, and cannot find disappearing roads in time

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