Rapid realization method for merging traffic subareas based on road network closed plot

Abstract

The invention discloses a rapid realization method for merging traffic subareas based on a road network closed plot. The method comprises the steps of determining a road network level according to a scale requirement for a traffic subarea when a macroscopic set analysis scale is increased; outputting the boundary and the road network as images, extracting pixel points, identifying closed plots inthe images, and endowing each plot with a unique mark; respectively extracting boundary coordinates of each traffic subarea, outputting the boundary coordinates as images, and extracting boundaries and internal pixel points of the traffic subareas; mapping pixel point coordinates of the traffic subareas into road network pixel point coordinates, counting overlapped pixel points of the traffic subareas and each plot, and endowing the traffic subareas with marks of the plot with the most overlapped pixel points; and combining the traffic subareas according to the marks of the traffic subareas toobtain a new traffic subarea. According to the method, the identification of the position relationship between the closed plot and the polygon of the road network is converted into the estimation ofthe overlapping area of the closed plot and the polygon, and the processing precision and speed are high under the complex road network.

Description

technical field [0001] The invention relates to a technology for identifying the positional relationship between closed plots and polygons in a plane road network, a technology for quickly identifying the positional relationship between a closed plot formed by a complex road network and a large number of traffic sub-areas with arbitrary shapes, and in particular to a closed plot based on a road network A fast implementation method for merging traffic sub-areas. Background technique [0002] In order to reduce the complexity of traffic analysis and traffic survey, the research area is usually divided into several sub-areas during traffic planning, which can be divided into three types according to the size of the space scale: traffic area, traffic center area and traffic large area. Generally, when conducting aggregate analysis of macro-traffic, it is often necessary to divide the traffic area, traffic center area and traffic large area at the same time to meet the analysis p...

AI Technical Summary

Problems solved by technology

However, the actual road network topology is very complex. How to effectively and completely identify closed plots and quickly merge traffic sub-areas is a problem that needs to be solved at present.

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