Research interests in the studies of complex systems have been booming in many disciplines for the last decade. As the nature of geographic environment is a complex system, researches in this field are anticipated. In particular, the urban street networks in the Geographic Information System (GIS) as complex networks are brought forth for the thesis study. Meanwhile, identifying the scale-free ...

Graphs composed of node and link are the most common way of representing street networks for any analysis beyond pure visual representation. The intuitive primal approach to convert a physical street network into an abstract mathematical graph is mapping street intersections as nodes while mapping street segments between intersections as links connecting nodes in the graph. Correspondingly, a d...

Nowadays, the expansion of the cities is an inevitable necessity; increasing the dependence of the citizens on motor vehicles and, consequently, making development of the transportation networks a necessity rather than an option. Thus, increasing car ownership and car use has created many problems for the cities, such as increasing greenhouse gas emissions, environmental pollution, casualties o...

Erratum to ‘‘Spatial data mining and geographic knowledge discovery – An introduction” [Computers, Environment and Urban Systems 33 (2009) 403–408] Diansheng Guo *, Jeremy Mennis b Department of Geography, University of South Carolina, 709 Bull Street, Room 127, Columbia, SC 29208, United States Department of Geography and Urban Studies, Temple University, 1115 W. Berks Street, 309 Gladfelter H...

In this paper, we derive a topological pattern of urban street networks using a large sample (the largest so far to the best of our knowledge) of 40 US cities and a few more from elsewhere of different sizes. It is found that all the topologies of urban street networks based on street–street intersection demonstrate a small world structure, and a scale-free property for both street length and c...

World population is raising, especially the part of people living in cities. With increased population and complex roles regarding their inhabitants and their surroundings, cities concentrate difficulties for design, planning and analysis. These tasks require a way to reconstruct/model a city. Traditionally, much attention has been given to buildings reconstruction, yet an essential part of cit...

Whilst large scale noise-mapping techniques have been applied extensively in practice, as required by the EU Directive on environmental noise, they are often not applicable for microscale urban areas such as a street or a square. This talk will discuss a series of simulation techniques as well as related acoustic theories for accurately calculating the sound field for micro-scale urban areas. T...

The potential ecological and human health risk related with urban street dust from urban areas of Tianjin, China was quantitatively analyzed using the method of toxicity characteristic leaching procedure (TCLP) and simple bioaccessibility extraction test (SBET). In the study, Hakason index, Nemerow index (P), the hazard index (HI) and the cancer risk index (RI) were calculated to assess the pot...

People familiar with an urban environment share common spatial knowledge enabling, for instance, successful communication about places and routes. Mental representations of this spatial knowledge, as well as reasoning and communication processes are organized hierarchically. This paper introduces a hierarchical model of urban street networks motivated by shared experience of space. This model i...

As an important component of urban vegetation, street trees play an important role in maintenance of environmental quality, aesthetic beauty of urban landscape, and social service for inhabitants. Acquiring accurate and up-to-date inventory information for street trees is required for urban horticultural planning, and municipal urban forest management. This paper presents a new Voxel-based Mark...