Method for generating traffic safety road characteristic graphs on basis of point-cloud

Abstract

The invention relates to a method for generating traffic safety road characteristic graphs on the basis of point-cloud. The method includes steps of 1), acquiring point-cloud data of a plurality of images of selected traffic regions by the aid of laser scanners; 2), preprocessing the point-cloud data; 3), importing preprocessed point sets into a CAD (computer-aided design) to hierarchically process the point sets and generating traffic road characteristic planar graphs; 4), converting the traffic road characteristic planar graphs in the CAD into ArcCIS (Arc geographic information system) formats layer by layer; 5), creating ArcGIS symbol libraries, automatically matching various map elements according to attributes of databases and completely generating the traffic safety road characteristic graphs. Compared with the prior art, the method has the advantages of speediness, simplicity, convenience, accuracy, reliability and the like.

Description

technical field [0001] The invention relates to the field of traffic surveying and mapping, in particular to a method for forming a traffic safety road feature map based on point clouds. Background technique [0002] The active traffic road feature map refers to a plane thematic map of road features including road intersections and road sections described in accordance with the requirements of various drawing standards. It reflects information such as road markings, signs, and features within a certain range. The graphic information and attribute information of road features, especially road signs and markings, from the perspective of its scale classification, it belongs to the category of urban large-scale plan, which comprehensively reflects information such as road location, traffic island, traffic signs, and markings. This information constitutes a detailed channelized map of the intersection. On the one hand, road channelization information can reduce traffic accidents...

AI Technical Summary

Problems solved by technology

The on-site sketch contains many ground objects and takes a long time to draw. This method greatly affects the production of active traffic road feature maps

[0004] According to the existing technology, the following four methods for making active traffic road feature maps can be summarized. The first one is the mapping method based on total station measurement, which has the advantages of high precision and strong flexibility, and has a good consistency However, the workload is heavy and the cost is high. The second is the mapping method based on municipal construction maps, which has the advantages of small workload, high precision and fast speed, but the data source is relatively difficult. The third is based on photogrammetry The first mapping method has good security, but the drawing is complicated and the cost is high. The fourth is the mapping method based on GPS measurement, which has the advantages of wide coverage, low cost, and high positioning accuracy, but is easily affected by terrain. low reliability

Images