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International Journal of Systems and Control 2008年第1期 57-63页

作者： LI Guobin1, WU Fadong2, WANG Yugui3 1.Henan Polytechnic University, Jiaozuo 454000, China 2.China Geosciences University,Wuhan 430074, China 3.Jiaozuo University, Jiaozuo 454000,China

Spatial-Temporal GIS is the inevitable tendency to realize dynamic digital earth with essential technology. The technology of static 3D GIS is already well developed, but the 4D GIS, traditional GIS plus temporal dimension is still at the theoretical study stage because its essential technology involves creation and manipulation of the temporal data base, which is related to temporal data base modeling, mainly dealing with storage and research of mass data. This paper considers reasonable TGIS data modeling to combine simple, convenient, and feasible snap-shot modeling with flexible object-oriented data modeling while avoiding the consistent and redundant snap-shot modeling and complex object-oriented data modeling. The paper adopts a special way of dealing with the property of time: first create a fundamental data; then produce buffer data through snapshot data modeling, and form a new data pool with time stab; and, finally, connect discrete layers to continuous ? with changing functions. By doing this, plenty of space is saved in data storage and it is easier to realize data calculation by dividing stored layers based on the varyious objects . Meanwhile, it can be once more for history events.?? The theoretical approach creatively studies the difficulties of TGIS and has been substantiated through Automatic Cellar Theory.

关键词： TGIS snapshot data modeling object-oriented data modeling

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