Abstract
The 3D road network scene helps to simulate the distribution of road infrastructure and the corresponding traffic conditions. However, the existing road modeling methods have limitations such as inflexibility in different types of road construction, inferior quality in visual effects and poor efficiency for large-scale model rendering. To tackle these challenges, a template-based 3D road modeling method is proposed in this paper. In this method, the road GIS data is first pre-processed before modeling. The road centerlines are analyzed to extract topology information and resampled to improve path accuracy and match the terrain. Meanwhile, the road network is segmented and organized using a hierarchical block data structure. Road elements, including roadbeds, road facilities and moving vehicles are then designed based on templates. These templates define the geometric and semantic information of elements along both the cross-section and road centerline. Finally, the road network scene is built by the construction algorithms, where roads, at-grade intersections, grade separated areas and moving vehicles are modeled and simulated separately. The proposed method is tested by generating large-scale virtual road network scenes in the World Wind, an open source software package. The experimental results demonstrate that the method is flexible and can be used to develop different types of road models and efficiently simulate large-scale road network environments.
Highlights
Road networks are one of the most important parts of infrastructure in modern cities [1]
An efficient method for road network simulation that considers the viewing situation should be studied. We address these challenges by proposing and developing a template-based 3D road modeling method for large-scale road network simulation
This method is not intended to generate a model for a single road, instead, it extracts modeling knowledge from geographic information systems (GIS) data and engineering rules and generates road templates
Summary
Road networks are one of the most important parts of infrastructure in modern cities [1]. Galin et al proposed a procedural road generation method based on the weighted anisotropic shortest path algorithm [14], and they later developed the method with a high-level user control [15] It focused on the road network planning to connect cities, towns and villages over large terrains. We address these challenges by proposing and developing a template-based 3D road modeling method for large-scale road network simulation. This method is not intended to generate a model for a single road, instead, it extracts modeling knowledge from GIS data and engineering rules and generates road templates. IInn aaddddiittiioonn,, bbeeffoorree mmooddeelliinngg tthhee rrooaadd GGIISS ddaattaa iiss cchheecckkeedd uussiinngg tthhee ttooppoollooggyy aannaallyyssiiss aanndd rreessaammpplleedd bbaasseedd oonn tthhee tteerrrraaiinn ddaattaa ffoorr pprreecciissee mtrsmtraoooeonomaoaadaddddllalslseesono,el,lwiwtcimncinocoggareeri.nn.ffifnnfReRtfeiicrocoocriirreaaeiormnnddnoaftatadpportdrsrooieeo,smlnln,gyyndadgrll.iitaeernnirdaroeeiidennnsse.gigaanrirotoneeefftraaelslallaressrsrcoogegtceiessot-ee-isnsggoccsmmnaaaslleeeneanndrrnttooeegdaaddrddagaadrmmnnaedddoosdeedooperresglgalessarap..annaFFtiiriiizzoanneentaaddisollllwwnayyr,s,iiettttahhhhcreoeeaanrrhhcosootiiaareendudrrsaacetertrrlelccueedhhmcmiitbcceeeaaadnnlslttebbbssdllaiooinsnoccecnckkdlluugddodedaanoititnnaamgggsseettsstorrrttuumrircacacetitiaguugtnrhrhrideectt
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