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Digital map construction method for traffic state monitoring system

A monitoring system and digital map technology, applied in maps/plans/charts, educational tools, instruments, etc., can solve problems such as low efficiency, programmers can't control the core of the program, etc., to achieve perfect support, improve accuracy and computing efficiency , the effect of improving the accuracy

Inactive Publication Date: 2012-07-04
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development speed is fast by adopting the secondary development method, but the programmer cannot control the core of the program, and sometimes it is difficult to implement complex functions, and the efficiency is low

Method used

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  • Digital map construction method for traffic state monitoring system
  • Digital map construction method for traffic state monitoring system
  • Digital map construction method for traffic state monitoring system

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Embodiment Construction

[0023] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0024] Such as figure 1 As shown in the flow chart of this method, the specific implementation steps of this embodiment are as follows:

[0025] (1) Hierarchical construction of maps:

[0026] In order to manage and update map information conveniently, the present invention adopts a layered structure to construct a digital map. Such as figure 2 As shown, the map data is divided into three structures: points, lines, and blocks, which respectively represent different elements on the map. Among them, the dot structure represents iconic locations such as government agencies, schools, and hospitals, and the block s...

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Abstract

The invention discloses a digital map construction method for a traffic state monitoring system, and relates to the technical field of digital maps. The method comprises the following steps of: constructing a map by using a hierarchical structure; reconstructing and extracting original information of roads and nodes; realizing bidirectional display of an operation result by using uniformity of geographic data of an up lane and a down lane of the same road; and finally providing a rapid conversion method from a GPS coordinate to a city building coordinate to meet the real-time requirement of atraffic estimation algorithm. The method can more accurately reflect the actual geographic information and reconstruct a geographic information structure for a GPS traffic state estimation algorithm,so that the implementation of the algorithm and the display of the operation result are facilitated, and the accuracy of the algorithm and the running efficiency are improved.

Description

technical field [0001] The invention relates to a method in the field of digital maps, in particular to a method for constructing a digital map used in a traffic state monitoring system. Background technique [0002] The traffic state monitoring system (Traffic State Monitoring System, TSMS) is one of the most important subsystems of the intelligent transportation system. Foundation. There are many ways to obtain traffic state information, including ground-sense coils and GPS-based traffic flow state estimation algorithms, among which GPS has many advantages such as all-weather, low cost, and real-time detection (you can use GPS receivers to receive civilian GPS signal, real-time positioning can be realized after the built-in chip calculation of the receiver), so it develops rapidly and is widely used in the field of intelligent transportation. Quiroga and Bullock published the paper "Travel timestudies with global positioning and geographic information systems: an integra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B29/00
Inventor 赵乾坤王冲鶄孔庆杰刘允才
Owner SHANGHAI JIAOTONG UNIV