Computer Aided Design Of Curvilinear Coordinate Quantitative Graphics

The theory of curvilinear coordinate quantitative graphics breaks through restrict of traditional planar coordinate system, expand the cartography space of quantitative graphics, also the ability of information description and exhibition. In cartography work of curvilinear coordinate quantitative graphics cartography, variables like curve function, curvature and directions, defines the exact shape of the coordinate frame and the inside graphics. Different methods of combination, forms large sum of multi-curvilinear coordinate quantitative graphic types, which have different impressive effect. Abundant graphic types can vividly provide useful information of the relation and contrast between the geographic statistic data series for thematic map users.Research on the curvilinear coordinate quantitative graphic cartography has just begun. The thematic mapping theory and method are still superficial in some extent. In this research, the author takes the former research as the referential knowledge, makes normative classification for the graphics. The author also finishes the design of curvilinear coordinate quantitative graphic atlas and finally the automatic cartography of these thematic graphics, refers to the mature statistic diagram patterns, with the custom defined interfaces of MapObjects 2.3 and Microsoft .Net Framework 2.0.Through the analysis of the background materials of curvilinear coordinate quantitative graphic theory, the author gets to know the importance, necessity and feasibility on this research. Through the discussion of mathematic basis and concept, the author finishes the design work of both single and multi curvilinear coordinate quantitative graphics. Research on the curvilinear coordinate quantitative graphic basic asthmatic and curvilinear coordinate quantitative graphic class'framework, function, interface and methods makes sufficient preparation for curvilinear coordinate quantitative graphic thematic mapping system (CCQGTMS). Finally, the design, coding and implement of CCQGTMS proves the feasibility and rationality of the visualization of curvilinear coordinate quantitative graphic through computer aided cartography.Design of curvilinear coordinate quantitative graphics'atlas, can be divide into single curvilinear coordinate quantitative graphic atlas and multi- curvilinear coordinate quantitative graphic atlas. Among them, the atlas for single ones includes three different types with names of beeline-curvilinear mixed, oblique- curvilinear mixed and pure curvilinear graphics. Rules for multi curvilinear coordinate combined quantitative graphic classification, lies in the different esthetic impression, and it can be divided into four types, like center shared combination, line shared combination , coordinate net shared combination and complex unit combinations.Curvilinear coordinate quantitative graphic thematic mapping for single ones comes into realization through displace of outer coordinate framework, while for multi ones, reuse, information appending and re-location of basic units help to complete the cartography work.Curvilinear coordinate quantitative graphic class (CCQGC) is designed with the aim of recording, redrawing of curvilinear coordinate quantitative graphics and interactive operations with geographic information software components. Based on the former research, this class has parameters for graphic and position. Graphic parameters have information for coordinate framework and inner graphics. Position parameters have information for location of each single unit. Other assistant parameters are useful for complex combination graphics.CCQGTMS accomplishes the thematic mapping work of curvilinear coordinate quantitative graphic through the curvilinear coordinate quantitative graphic thematic mapping wizard. This wizard provides computer aided thematic mapping service in three different cartography grades, in need of satisfying different users. They are automatic mapping wizard, semiautomatic mapping wizard and semi-manual mapping wizard. These wizards help the software users to fulfill the cartography work conveniently and efficiently, in thought of humane based and user oriented.The design work of curvilinear coordinate quantitative graphic atlas, scientifically and reasonably classified the abundant complex curvilinear coordinate quantitative graphics. It also provides credible basis for future theoretical research. CCQGTMS practically proved the possibility of computer aided cartography in curvilinear coordinate quantitative graphics thematic mapping. Meanwhile, this system provides the expansible software framework for future enrichment of the atlas.