期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2002
卷号：XXXIV Part 4
出版社：Copernicus Publications
摘要：Wireless Internet is one of the fastest gro wing areas in the information economy, and as a result, location-based services have undergone explosive growth. In mobile computing, considerable research has been focused on the infrastructure and architecture design to try and solve system bottlenecks, such as the development of third generation mobile systems or to resolve cache management of the database. The database design, however, is an essential issue that must be considered. This paper introduces a new conceptual model for a spatial temporal data set for mobile GIS and explores the creation of a dynamic database. The database is updated continuously to reflect the real situation, and captures the movement of a mobile user. The goals are to fine-tune the original database and thus provide the latest and accurate information for mobile users with a limited communication band width and to improve the response time. Issues of spatial temporal data integration in mobile databases, how they work and performance for real time applications and on-line queries are discussed. We assume that the spatial information is in a simplified structure with only one temporal dimension; the GIS are developed based on a relational database
关键词：dynamic database; location-based service; mobile GIS; spatial ; temporal data set; wireless web application
