Map Libraries |
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| Authors: | Mingguang Wu A-Xing Zhu Li He |
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| Institution: | 1. Mingguang Wu and A-Xing Zhu, Key Laboratory of Virtual Geographic Environment of Ministry of Education, Nanjing Normal University, Nanjing, People’s Republic of China;2. State Key Laboratory Cultivation Base of Geographic Environment Evolution (Jiangsu Province), Nanjing, Jiangsu, People’s Republic of China;3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, People’s Republic of Chinawmg@njnu.edu.cn;5. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, People’s Republic of China;6. Li He, School of Humanities and Social Science, Xi'an Jiaotong University, Xi'an, People’s Republic of China |
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| Abstract: | Colour distortion, which is caused by the unavoidable mismatch between a map’s gamut and a device’s gamut, negatively affects the semiotic quality of maps. Cartographic communication often suffers from undesirable colour inconsistency. This method models cartographic colour reproduction as a constrained transform problem, namely, adapting a map’s gamut to fit a device’s gamut while preserving the semiotic quality. First, the characteristics of the map’s gamut are investigated by considering cartographic principles, and the fundamental concerns of preserving semiotic quality are proposed. Then, the self-organizing map method is introduced to iteratively optimize the cartographic colour reproduction. We implement this method and evaluate it based on a series of thematic maps. The results indicate that the proposed algorithm offers better results than two alternatives in terms of facilitating cartographic colour reproduction. |
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| Keywords: | Map colour colour reproduction cartographic principles self-organizing map |
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