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In this paper, a practical model is proposed to improve displaying speed and effect of vector data on Mobile GIS. The model is constructed by making some improvements on traditional pyramid model, and a data file format is specially designed for it. Moreover, the vector data preprocessing methods of this model including map classification and subdivision, feature clipping and data compression are discussed. Also, some techniques such as double cache, high-speed buffer are used to further raise the displaying efficiency. Experiments on vector data show that, the solution in the paper is helpful to raise the speed of displaying vector data.
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