Title :
A visual reasoning approach for data-driven transport assessment on urban roads
Author :
Fei Wang ; Wei Chen ; Feiran Wu ; Ye Zhao ; Han Hong ; Tianyu Gu ; Long Wang ; Ronghua Liang ; Hujun Bao
Author_Institution :
State Key Lab. of CAD&CG, Zhejiang Univ., Hangzhou, China
Abstract :
Transport assessment plays a vital role in urban planning and traffic control, which are influenced by multi-faceted traffic factors involving road infrastructure and traffic flow. Conventional solutions can hardly meet the requirements and expectations of domain experts. In this paper we present a data-driven solution by leveraging a visual analysis system to evaluate the real traffic situations based on taxi trajectory data. A sketch-based visual interface is designed to support dynamic query and visual reasoning of traffic situations within multiple coordinated views. In particular, we propose a novel road-based query model for analysts to interactively conduct evaluation tasks. This model is supported by a bi-directional hash structure, TripHash, which enables real-time responses to the data queries over a huge amount of trajectory data. Case studies with a real taxi GPS trajectory dataset (> 30GB) show that our system performs well for on-demand transport assessment and reasoning.
Keywords :
data visualisation; road traffic; traffic engineering computing; user interfaces; TripHash bidirectional hash structure; data queries; data-driven transport assessment; road-based query model; sketch-based visual interface; taxi GPS trajectory dataset; taxi trajectory data; traffic control; urban planning; urban roads; visual analysis system; visual reasoning approach; Global Positioning System; Indexes; Roads; Topology; Trajectory; Visualization; Hash Index; Road-based Query; Taxi Trajectory; Visual Analysis;
Conference_Titel :
Visual Analytics Science and Technology (VAST), 2014 IEEE Conference on
Conference_Location :
Paris
DOI :
10.1109/VAST.2014.7042486