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：Mapping agencies world-wide produce a range of different types of maps, in efforts to meet different user requirements. These maps are usually designed in a digital environment and some of them are distributed through the World Wide Web. One important issue for those agents is the appropriate modelling and handling of map objects from which the digital maps are composed. , This paper focuses on this aspect and as such addresses two aspects. First, the semi-structured nature of data composing a map is discussed. Second, the Object Exchange Model (OEM), a popular model for semi-structured data, is adopted to represent a map. Several configurations regarding the representation of a map in OEM are proposed. Finally, it is shown how useful information can be extracted from those configurations using Lorel query language for semi-structured data
