Research On The Key Technologies Of Adaptive Cartographic Visualization

Cartographic visualization system has faced a challenge of a series of complicated environment, such as popularization of users, diversification of map data, isomerization of load-bearing platform and application fields’extension in this new geography information period. Adaptive cartographic visualization system could adapt itself in these complicated environments neatly and realize the individuation service which definitely manifests the idea of“user-centered design”. However, at present electronic screen has nearly taken the place of the paper map, on which the existed theories and technologies are all based, so designer and users face with a brand new map perception and reading environment which has resulted in many problem. For example, the existed design of map lacks of the scientific guidance, and the display effect of map is unsuitable for visual perception on screen. What’s worse, the reading efficiency is low which has complicated the recognition process. All these factors require that new cartographic visualization system has to establish a theory and technology system which is suitable for current application needs and could supervise the design of screen map. The research on the adaptive cartographic visualization mainly focuses on overcoming the research and application problems in the development of cartography, and explored the theory and technology methods of the humanized design of ubiquitous map visualization system (electronic map system).The realization of adaptive cartographic visualization system is still in the exploring period. As a highly intelligent humanized system, adaptive cartographic visualization system can be realized by the support and cooperation among knowledge of multi-fields. This paper has attempted to research into the key technology of adaptive cartographic visualization. The achievements are as follows:1. Illustrate the research content of the paper. This paper has summarized research actuality of the cartographic visualization system, and the adaptive theory and technology. Meanwhile, it points out the existing problems in the key technology of adaptive cartographic visualization. It has also introduced the research background, significance and objectives, and the further research is also included in this paper.2. Establish the theory foundation of the paper. This paper has introduced the related concepts and characteristics of adaptive system,and it has concentrated on the theory and methods of adaptive in the related fields. It has studied on the basic theory and development framework of ACViS. At last, it has also briefly analyzed the key problem in the adaptive cartographic.3. Study on user model of ACViS. The paper has introduced the related knowledge and classification of user model, concluded current user modeling technology. It has studied on the relationship between user model and ACViS, and introduced construction and matching process of User model in ACViS. It has put forward a more complete and pertinent user model named quaternary interaction user model, meanwhile, the paper has studied on the monitoring mechanism of user action, and has used extended apriori association rules to the mining of user action database to adapt for ACViS, and has gave an example to validate. The paper has put forward a new matching algorithm of user model named similarity matching algorithm based probability, the process of algorithm has been validated by example and introduced in detail.4. Study on visual perception experiment of visualization design in ACViS. The paper has developed visual perception experiment software of visualization design in ACViS, and has done visual perception experiment for resolving related problem, It also has summarized and epurated visualization design principle in ACViS through analyzed experiment result and studied on related theory.5. Study on the construction method of ACViS knowledge base. Firstly, this paper has summarized the related knowledge, and studied the structure of the knowledge base in ACViS. Secondly, it has expatiated on system model of knowledge base in ACViS and adaptive reasoning strategy. Thirdly, it has analyzed the characteristics of the visualization design knowledge of ACViS. Meanwhile it has concentrated on the representation of visualization design knowledge of ACViS. What’s more, it has expatiated basic table structure of this base and refined knowledge base by using the relation database. At last, the paper has constructed the knowledge base using VC++ and ADO technology and the running case has also been given.6. Study on adaptive strategy on the visualization of ACViS. This paper has discussed the adaptive strategy of user interface, color and symbol, and the content display which has laid a solid portion technology foundation for the final realization of ACViS.7. Design and realization adaptive design system of electronic map. This paper has validated forenamed key technology through adaptive design system of electronic map. In this part of the paper, the demand and structure of this system has been introduced, and the key technology support of the system has been analyzed. With introducing the function of the system, it has laid great importance on the research of the construction of ACViS template base, and the adaptive design of electronic map system has been realized. Finally, a validation example has been given.