Qinghua Qiao

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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(More)
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(More)
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 istributed environments, and(More)
Remote sensing image classification is one of the important methods of obtaining land cover/use information for nationwide general survey of geographical conditions in China. In this study, an object-oriented decision tree algorithm is utilized for land cover and land use mapping from high resolution WorldView-2 satellite remote sensing images. The major(More)
Airborne LIDAR is one of the quickest way to collect digital surface information, and point cloud dataset is widely used for natural disaster emergency and route planning. However, little research has been conducted on massive point cloud dataset transmission and visualization based on Internet. The paper discussed the characteristics of point cloud data,(More)
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