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Transportation equity maps are essential for allocating limited public resources to achieve social equity. Transportation equity mapping uses accessibility as a primary indicator to measure inequity in a region. Traditional place-based accessibility measures can not offer fine-grained information to describe socio-economic characteristics and travel patterns individually. People-base accessibility...
Although geographic information systems (GISystems) have been widely used in both public and private sectors, geographic information is still not effectively used by common citizens for their everyday's life. A metropolitan spatial service infrastructure (MSSI) is a new vision to build a societal GIS allowing every citizen to create, share, and use geographic information and services. We propose our...
The popular methods of route planning, the planar and hierarchical algorithms, are mainly based on the Dijkstra's algorithm. The shortest path in machine computation is always different from the optimal one in a human cognition because travel experience information of human is neglected. In this paper, hierarchical travel experience information of road network is given by statistical analysis on a...
This paper introduces a design framework for developing GIService Web portals which are supported by grid computing and service-oriented architecture. A GIS Web portal can be enhanced by grid computing technologies to improve its performance, usability and security. The loosely-coupled Internet GIServices can be combined and integrated by implementing service-oriented architecture (SOA). The grid...
Current map generalization for massive spatial data is becoming more and more urgent. It is necessary to study the integration of new technologies, such as distributed computing, which is important to provide high-quality geographic information services. This paper proposes an architecture of automated map generalization in distributed environments, and implements a prototype system to demonstrate...
This article discusses how participatory GIS (PGIS) can be improved by applying current start-of-the-art computing technologies, in particular high performance computing technology. The discussion covers the methods and tools for the four types of space-time collaboration situations (different place/time). While the four types are all addressed, the focus is directed to the same time, different place...
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