Spatio-temporal Access in Persistent Java
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چکیده
Persistent programming languages are targetted primarily at application systems involving complex data structures and relationships, as typi ed by Geographical Information Systems (GIS). The many sophisticated GIS products available today were developed before concepts like persistence and objectorientation had been well-established, and there is an urgent need to construct new GIS technology that can bene t from the advances made in these two areas of Computer Science. This will not only alleviate problems in existing GIS systems caused by the impedance mismatch, but can also expand its capabilities by providing for e ective spatio-temporal manipulation of geographic data. The popularity, accessibility and characteristics of Java make it a very attractive vehicle for this. In this paper we propose an architecture for spatiotemporal data access in PJama. We describe our prototype implementation of this architecture along with its application in a marine biology project. Initial results indicate that PJama is a viable implementation platform for spatiotemporal GIS. As our prototype nears completion we begin performance evaluation to substantiate this claim and measure the e ectiveness of PJama GIS under large, real-world application loads.
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تاریخ انتشار 1998