Browsing by Author "Fang, Yu"

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    GridGIS portal development based on OGCE
    (SPIE-INT Soc Optical Engineering, 2008) Yumei Sun; Yu Fang; Bin M. Chen; Tohid Ahmed Rana; Jiayuan Lin; Xiaona Li; Lin, Jiayuan; Sun, Yumei; Li, Xiaona; Chen, Bin; Rana, Tohid Ahmed; Fang, Yu
    GridGIS is the application of grid computing technology on GIS field which aims to realize the spatial information sharing and cooperative service. However current grid technologies are generally difficult to use so the development and deployment of Web portals that simplifies usage of grid resources has become popular. Grid-enabled portals can thus serve as simple single points of entry or gateway to multiple computing resources providing access to complex grid tools and services. In this paper we give an overview of GridGIS project and the key role of that GridGIS portal is playing in reaching its goals. Then we describe the portal and Open Grid Computing Environment (OGCE) portal toolkit. Basing on OGCE and integrated Open Geospatial Consortium (OGC) Web service we design the architecture of the GridGIS portal. In an open source development environment we develop and deploy GridGIS portal which includes authentication module Grid Port Information Repository (GPIR) portlet Comprehensive File Management (CFM) portlet Grid Resource Allocation and Management (GRAM) portlet and Map Viewer portlet. © 2008 SPIE. © 2009 Elsevier B.V. All rights reserved.
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    Research on the middleware of grid GIS - Distributed cooperative computing GIS software and its key technologies
    (SPIE-INT Soc Optical Engineering, 2007) Yumei Sun; Yu Fang; Bin M. Chen; Tohid Ahmed Rana; Sun, Yumei; Chen, Bin; Rana, Tohid Ahmed; Fang, Yu
    This paper introduces the concept of grid computing and its characteristics. Basing on analyzing the characteristics of grid computing we apply grid computing to GIS field to construct grid GIS which is the application of grid computing on geographic information system with grid computing as the basic running environment. According to the architecture of grid and integrating the characteristics of GIS we design the architecture of grid GIS which has three layers. They are grid GIS resource layer grid GIS middleware layer and grid GIS application layer. Among them the grid GIS middleware layer is the most important. Then this paper expatiates on our research on grid GIS middleware which is about the design and development of distributed cooperative computing GIS software. The key technologies of the distributed cooperative computing GIS software are discussed which include technology of global spatial resource management spatial data computing task allocation and management system consistency mechanism and system security mechanism. The implementation process is also presented. At last this paper presents the further researches of the distributed cooperative computing GIS software. © 2008 Elsevier B.V. All rights reserved.