專題地圖圖例的定量化研究
[Abstract]:Thematic map is a kind of carrier of geographic information visualization. A good legend style can make map users accurately and quickly interpret geographical information. Legend is an important means to transmit geographical information. As an important achievement of various industries, the function of legend is especially important. Because of the complexity of geographical entities and phenomena and the particularity of symbols, many difficulties are found in the process of making thematic maps. Most of the traditional thematic maps need manual drawing and manual compilation. With the rapid development of computer technology and geographic information system, the design and compilation of thematic map symbols and thematic map legend have been greatly improved, but there are still low precision, high error rate and low standardization. Low degree of automation, time-consuming and laborious and other problems. Therefore, in order to realize the accurate expression of thematic map information, the automation and standardization of legend are urgent. In this paper, starting from the point, line and surface symbols, the quantitative representation scheme of thematic map legend is studied by using the object-oriented theory, which makes cartographers more flexible in the representation of legend and strengthens the understanding of complex geographic information. Make map making more standard. The main contents are as follows: 1. According to the different expression content of the thematic map, the composition of the general legend is analyzed: color, symbol, note, name, grading information and so on; 2. According to the national standards and related industry norms, the paper puts forward the scheme of quantitative representation of legend, including the quantitative expression of legend quantity, the quantitative expression of legend symbol, the annotation of legend and the quantitative expression of name. The quantitative expression of legend sequence, the quantitative expression of legend layout, the quantitative expression of legend classification, etc. 3. The dynamic legend based on spatial data is analyzed from several aspects, such as design idea, function design, data flow design and so on, and the quantitative expression of dynamic legend based on spatial data is realized. 4. The static legend based on interactive operation mainly takes five basic legends of aeronautical geophysical exploration specialty: section, track line, abnormal point, isoline, color band as examples, and realize the quantitative representation of legend one by one; 5. In the form of dynamic link library, the encapsulation of legend module is realized, which is convenient for the integration and call of other systems. Finally, the problems and prospects of quantitative representation of thematic maps are summarized.
【學(xué)位授予單位】:中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:P285
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