Electronic Map-based Hypermedia Data Model

Map,a symbol of space cognition,has become one of three cultural tools for human being to recognize and know about the world.As a new type of carrier of spatial information,electronic map possesses many features:dynamic,interactive,multimedia integration,etc.Multimedia electronic map combines several medias such as graphs,images,texts,charts,sound,animations,videos etc.,and can express spatial information directly,visually and vividly via sense perceptions like vision,hearing,sense of touch.Based on an electronic map-based hypermedia data model (EMBHDM),this thesis makes a study on the technologies of nonlinear storage,organization,management and browsing of information as well as organization of data on the basis of the relationship between multimedia information of electronic maps.Its functions can be concluded as the following:1) It can form information network by using various multimedia information (graph,image,text,chart,sound,animation,video,etc.),i.e.nodes.2) It is convenient for users to create nodes and set up corresponding links.3) It can support to search and browse multimedia database.4) Information is organized and managed in associative and non-linear manner,which conforms to users' reading habits and is more convenient to operate.This thesis first analyzes some features of electronic maps and hypermedia technology,and then illustrates the creation of EMBHDM with some examples.Experiments show that this model can efficiently organize and express multimedia data.Based on the features of electronic map and hypermedia,this paper makes a study on the technologies of nonlinear storage,organization,management and browsing of information as well as organization of data on the basis of the relationship between multimedia information of electronic maps.The tests prove that based on an electronic map-based hypermedia data model can better express multimedia information based on electronic maps.The authors believe that the development of electronic map will have a good prospect in hypermedia fields,if a hypermedia language adapting to electronic map appears in the future.