Title :
Query and trigger of moving objects in WebGIS environment
Author :
Fengli, Zhang ; Xinggao, He ; Zhiguang, Qin ; Zhou Mingtian
Author_Institution :
Sch. of Comput. Sci. & Eng., China Univ. of Electron. Sci. & Technol., Sichuan, China
Abstract :
In this paper we illustrate the architecture of the WebGIS environment, present a model of moving objects in cargo delivery system. This model captures spatial and temporal aspects of the moving objects and incorporates the uncertainties associated with moving objects. We give the operators and trigger definition over time and space. Moreover we present special triggers which can be used to ensure that the answer-set to a spatiotemporal continuous query issued by a moving object, and develop the cargo delivery system based on our model.
Keywords :
Internet; geographic information systems; goods dispatch data processing; query processing; WebGIS environment; cargo delivery system; moving object query; moving object trigger; spatiotemporal continuous query; Spatiotemporal phenomena; Uncertainty;
Conference_Titel :
Computer and Information Technology, 2004. CIT '04. The Fourth International Conference on
Print_ISBN :
0-7695-2216-5
DOI :
10.1109/CIT.2004.1357288
