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A postgis-based online traffic flow cobweb graph generation method

A technology of traffic flow and cobweb graph, applied in the field of traffic information, can solve the problems of unable to monitor the characteristics of urban traffic situation changes online for a long time, unable to share, complex operation, etc., and achieve fast execution mode and calculation efficiency, simple steps, and simple operation Effect

Active Publication Date: 2021-08-03
SHENZHEN URBAN TRANSPORT PLANNING CENT
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Problems solved by technology

[0006] The purpose of the research and development of the present invention is to solve the problems of cumbersome steps, complex operation, high cost, inability to share, inability to share, and inability to monitor the characteristics of urban traffic situation changes online for a long time in the prior art. A brief overview of the present invention is given below , in order to provide a basic understanding of certain aspects of the invention

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  • A postgis-based online traffic flow cobweb graph generation method
  • A postgis-based online traffic flow cobweb graph generation method
  • A postgis-based online traffic flow cobweb graph generation method

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specific Embodiment approach 1

[0035] Specific implementation mode one: refer to Figure 1 to Figure 2 , illustrate the present embodiment, a kind of online traffic flow cobweb diagram generation method based on PostGIS of the present embodiment, concrete steps are:

[0036] Step 1. According to the distribution requirements of the traffic trips, the trips OD and the area vector shp layer are stored in the database;

[0037] According to the distribution requirements of traffic trips, the area vector shp layer data is stored in the PostGIS database to generate spatial data, which has a geom (geometric field type) field, and the polygon_shp table is generated in the database.

[0038] According to the distribution requirements of traffic trips, the travel volume OD is stored in the PostgreSQL database, and the OD_table table is generated in the database. Table 1 is the OD_table sample data table.

[0039] surface od_table sample data

[0040]

[0041] Step 2, generating buffers for each planar vecto...

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Abstract

The invention relates to a PostGIS-based online traffic flow cobweb graph generation method, which belongs to the field of traffic information technology. The invention includes space data library, buffer analysis, space analysis and path allocation space algorithm, and realizes standard data input and traffic flow cobweb diagram distribution result visualization method at the front end. The method standardizes the input and output data, supports users to replace the input data online, thereby quickly outputting the expression mode of the traffic corridor distribution cobweb diagram, and solves the problem of the complicated process of drawing the traditional cobweb diagram. Features such as manual operation costs.

Description

technical field [0001] The invention relates to the technical field of traffic information, and relates to a PostGIS-based online traffic flow cobweb graph generation method. Background technique [0002] The traffic flow spider diagram is the result of eliminating the cross-area expected line, leaving only the expected line of the adjacent area. The value of the expected line between the adjacent areas is not only the traffic demand value of the adjacent area, but the value of all traffic passing through the adjacent area. The value of the corridor in the community is the traffic distribution result of the whole network. This kind of graph can clearly express the trend of urban traffic passenger flow. It presents the shape of urban traffic corridors, which can evaluate the construction process of urban corridors, the supply and demand of transportation infrastructure, the connection strength of urban agglomerations and the degree of "integration", and provide data support f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/29G06Q50/26
CPCG06Q50/26G06F16/29
Inventor 张晓春丘建栋庄立坚林青雅林丽健
Owner SHENZHEN URBAN TRANSPORT PLANNING CENT
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