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A Road Geometric Feature Extraction Method Based on Taxi Trajectory Data

A trajectory data and geometric feature technology, applied in the field of road geometric feature extraction based on taxi trajectory data, can solve the problem of low degree of refinement of road network information extraction, achieve the effect of simple trajectory point offset process and avoid mathematical operations

Inactive Publication Date: 2021-10-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to propose a road geometric feature extraction method based on taxi trajectory data, which solves the problem of low refinement of current road network information extraction, can reflect the real topological relationship of the road network, and realize road Extraction of driving direction information

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  • A Road Geometric Feature Extraction Method Based on Taxi Trajectory Data
  • A Road Geometric Feature Extraction Method Based on Taxi Trajectory Data
  • A Road Geometric Feature Extraction Method Based on Taxi Trajectory Data

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[0054] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0055] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0056] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention relates to a road geometric feature extraction method based on taxi trajectory data. First, the taxi trajectory data is preprocessed; then the driving direction angle of each trajectory point is calculated; and then the original trajectory point set is traversed to obtain the trajectory point P i The set of similar track points; then traverse the set of similar track points and calculate the track points P i The offset distance, get P i Offset coordinates; then complete the traversal of the track point set, the P i The offset coordinates are updated to the current coordinates of the track points, and the average offset distance of all track points is calculated. If it is less than or equal to the threshold, the offset track points are converted into track lines, and each track line is buffered and Fusion into surface elements for binarization, using ArcScan tool to extract road network L. By offsetting the track points, the present invention effectively avoids the clustering of adjacent tracks in different driving directions, and the extracted road network can better reflect the real road structure and has high practical value.

Description

technical field [0001] The invention relates to the field of geographic information system and intelligent transportation research, in particular to a road geometric feature extraction method based on taxi track data. Background technique [0002] As a key component of basic geographic information data, urban road network data is an important data source for urban intelligent transportation construction. Accurate and fine road network data can provide effective decision-making support for urban traffic congestion control and urban planning. Highly detailed road network information is an important task in the current transportation field. With the maturity of mobile positioning technology, taxis equipped with GPS positioning devices can obtain a large amount of spatio-temporal data about urban road networks in a short period of time, which has the advantages of real-time, low cost, and strong pertinence. Refined road network information has become an important research conte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62G06F17/18G06F16/29G08G1/01
CPCG08G1/0125G06F30/20
Inventor 邬群勇吴祖飞张良盼
Owner FUZHOU UNIV