Method for making dynamic traffic information diagram based on svg vector data format

Abstract

The invention discloses a dynamic traffic information sketch making method based on a SVG vector data format. The method comprises steps of firstly, using a vector drawing tool to design and draw a traffic information sketch and storing the traffic information sketch as a sketch file in a svg format; carrying out uniqueness numbering on each road object in the sketch file, establishing corresponding relations between the numbers and position codes of the corresponding map roads, and storing the corresponding relations in a database; storing the position codes of the map roads and the length information thereof in the database; and using the sketch file and the stored position code database as input data, and converting the sketch file into a sketch template fused with the svg format of the position code information through a conversion tool, wherein through the conversion tool, functions of road segmentation, road separation and sketch scaling down in the sketch template are achieved. According to the invention, defects in the traditional dynamic traffic information sketches are overcome; achieving procedures of the dynamic traffic information sketch are simplified; workload is greatly reduced; generation maintenance efficiency of the sketch is improved; and cost is reduced.

Description

technical field [0001] The invention relates to a method for making a dynamic traffic information diagram based on the SVG vector data format. Background technique [0002] The dynamic traffic information diagram refers to a simple graphic used to display real-time traffic information, which shows the real-time traffic status and event information of intercity expressways, urban expressways, and urban traffic arteries; the diagram template is a dynamic traffic information summary The storage format of the map, which records the graphic elements used to represent the dynamic traffic information diagram and the road position code used to represent real-time traffic information, where the graphic elements are static elements that constitute the dynamic traffic information diagram, including background elements, road facilities Elements, sign elements, and annotation elements; road location codes are the most basic units used to release real-time road traffic information, and ro...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned first implementation method requires manual segmentation of the road, the production process is complicated, and the workload is heavy. When the road changes, it is necessary to regenerate the bitmap for production, which is not easy to update and maintain, and the size of the generated dynamic traffic information diagram is fixed. Scaling in bitmap format affects resolution

In the second implementation method, because the roads need to be registered in the background base map and then extracted one by one, the production process is complicated and the workload is heavy. The same dynamic traffic information diagram needs to maintain two sets of data at the same time, which has poor synchronization and is not easy to update. and maintenance, and the size of the dynamic traffic information diagram is fixed and cannot be scaled

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