嵌入式设备室内地图的瓦片金字塔优化

摘要

In order to read and display indoor maps quickly, tile-Pyramid technology was introduced into indoor map service. On the base of original tile-Pyramid model,index resolution function was instead of linear resolution function. Based on the optimized model, the impact of tile scale on the file deletion rate, file reading access time and time stability was comprehensively analyzed. The result showed that:linear resolution function was more suitable for indoor maps and file deletion rate was reduced in the process of amplification. When select tile scale,the block fetch size,file reading access time and time stability should be taken into consideration. Appropriate tile scale can make map load fast and get stable loading time, which can make users get comfortable user experience.%为了快速读取和显示室内地图，将瓦片金字塔技术引入室内地图服务。在原有瓦片金字塔分层模型的基础上，用线性分辨率变化函数取代瓦片金字塔的指数分辨率变化函数；在优化模型的基础上，综合分析瓦片规格对文件删除率以及文件读取时间大小和稳定性方面的影响。实验结果表明：线性的分辨率变化函数更适合室内地图，在放大、缩小的过程中能够更好的降低文件的删除率；选取瓦片规格时需要综合考虑分块大小以及文件读取时间大小和稳定性，能够使得地图加载的时间更短，而且时间上更稳定，让用户能够得到更好的体验。