Method and system for generating travel od matrix based on spark RFID data

Abstract

The invention provides a method and a system for generating RFID (Radio Frequency Identification) data into a tripping OD (Origin Destination) matrix on the basis of Spark. The method comprises the following steps: storing a RFID data set into a distributed file system, converting the RFID data set into a resilient distributed dataset, obtaining a discrete series which is sorted according to time and contains vehicle identity information and a travel trajectory through the resilient distributed dataset; and extracting the RFID acquisition point numbers of the origin and the destination of the discrete series, taking the numbers as key values, and carrying out summation on the value of the same key value to obtain and store the OD matrix. The advantages of the Spark distributed processing technology and a rich data operation and conversion method provided in RDD (Resilient Distributed Datasets) can be adopted to efficiently and quickly generate the vehicle tripping OD matrix at low expenditure, the consumption of manpower and financial resources due to a traditional OD matrix acquisition method can be avoided, and meanwhile, a performance bottleneck problem generated when a single computer is adopted to process global data can be avoided.

Description

technical field [0001] The invention relates to the fields of computer processing and traffic flow statistics, in particular to a method and system for generating travel OD matrix based on Spark RFID data. Background technique [0002] OD survey, that is, traffic start-stop survey, OD survey results have been used in road network planning, feasibility study, design, traffic organization and management of new or reconstructed projects. A large number of OD survey data, the prediction of long-term traffic volume, the determination of road types and grades, the setting of interchanges, the design of road cross-sections, the configuration of traffic service facilities, traffic management and control, planning schemes and the national economy of construction projects Evaluation and financial analysis provide a quantitative basis, which in turn lays the foundation for the improvement of traffic planning and scientific decision-making of construction projects. OD survey results are...

AI Technical Summary

Problems solved by technology

One is the use of manual surveys. Such survey methods include roadside surveys, family visits, telephone surveys, etc. Such methods require a lot of manpower and financial resources, and the survey cycle is long, usually once every few years; The second type of investigation method is the method of obtaining OD traffic volume by using the traffic volume of the road section to reversely calculate the OD traffic volume. This type of method saves labor costs and has a relatively large advantage compared with the first type of method. The consideration of traffic flow only involves some road sections, so it will have a relatively large impact on the accuracy of the OD matrix

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