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Accurate and timely updated three-dimensional (3-D) model data of interchange bridges are significant for traffic navigation, landscape design, and many other applications. In this study, we explore the potential of using airborne light detection and ranging (LiDAR) data for 3-D reconstruction of large multilayer interchange bridges. To reduce the technical difficulty in this 3-D reconstruction process,...
In this paper, a simulation model of pedestrian flow based on geographical cellular automata, GCAP Model, is established. The GCAP Model takes the walking suitability of the roads into consideration, and uses six dynamic parameters to simplify tactically the decision-making process of pedestrians in their movements. The simulation results show that the model is quite sensitive to different road conditions...
The green space information extraction is significant for study on urban remote sensing because of its ecological and socioeconomic functions. And with the traditional methods the precision is very low, we educe decision tree of extraction to raise the accuracy rate. We take Shanghai as a case study area from QUICKBIRD imagery, analyzing spectral characteristics of 4 multi-spectral bands. And we also...
This paper introduced fast marching and minimum path into road extraction from remotely sensed images and proposed a new road extraction method. The work builds on a novel variant of fast marching approach, named as multi-points fast marching. The underlying idea is to calculate minimum action map with multi-points propagating simultaneously. Efficacious saddle points are selected with judgment criterion...
In the last 30 years, because of continuous high economic growth, industrialization and urbanization, China's urban form and spatial structure has undergone enormous changes. Besides, urban problems keep emerging, especially urban traffic congestion has become a hard-to-solve problem of major cities, which is severely restricting urban sustainable development. Facing the fast-changing of urban space...
Urban planning is human purposeful, conscious social activity. It is influenced by nature and human society. Research of urban planning and urban space expansion is in the forefront of global urban research, and is one of the hot topics. China is troubled by population growth, lack of resources, ecological and environmental degradation, and rational urban development is closely related to sustainable...
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