| The Visualization of Quantitative Graphic Patterns in the bent axle coordinate system quantifies is the research forefathers on the foundation the open-minded which continuing the research the of " oblique axes quantifies the graph ", and was broken through the limitations of straight axle coordinate system, and at the bent axle has been in progress with curvature explores research, and enriched the form of quantification graph, and increased the method expressing, had offered the new one for the fact that the data in geographical information are excavated and shared with the data Way .A different from system of coordinates of straight axle one variable, bent axle of system of coordinates large than Straight axle, Such as the Curvature of the bent axle , Concave protruding direction ect. At the same time Make the quantization figures formed have various kinds of abundant model because of the existence of curvature, and Have increased aesthetic feeling and artistic result in maps greatly .This text has Studied to quantify graph mathematics type of the foundation, curvature threshold limit of crankshaft, method that makes up and visual variable further , at same time Studying the Mathematics algorithm of the crankshaft quantifies graph under the coordinate system and the programming method of VB secondary development software on the basis of Supermap package .This thesis is takes crankshaft coordinate system research as theory nucleus, and takes application study as the technology means .This thesis is studied for the theory core with the system of coordinates of the bent axle, regard application study as the technological means .According to studying to the theory that the system of coordinates of the bent axle is visual and practical application ,This thesis also can be divided into two most parts :First part is theory part ,this part regards system of coordinates of the bent axle as the main research object, analyzed the... |
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