分布式通用瓦片生成引擎设计与关键技术研究

Key Technology for the Design and Optimization of the Distributed General Tile Creation Engine

对地观测技术的发展产生了大量的地理空间数据，基于这些地理空间数据高效生成多种类型瓦片是实现高分数据快速处理和及时服务的关键。本文在对各种瓦片生成过程详细分析的基础上，设计了面向多种类型瓦片快速生成的通用瓦片生成引擎，通过分布式计算提高瓦片的生成效率，通过分布式云存储系统提高瓦片存储I／O效率。实验结果表明，该通用瓦片生成引擎能够生成影像、DEM、电子地图等多种类型瓦片，且生成效率与单机相比有显著提高，完全能够满足为各类客户端提供二三维可视化服务的需求。

With the development of earth observation technology, large amounts of geospatial data are produced. Creating various types of tiles based on these geospatial data is the key to rapid processing of high - resolution data and providing on - time service. On the basis of a detailed analysis of tile creation process, a general tile creation engine oriented to various types of tiles is designed. The tile creation efficiency is improved by distributed computing, and the storage I/O throughput is improved by using cloud storage system. The experiment resuhs show that the engine can create several types of tiles, such as image tiles, DEM tiles and map tiles, and the efficiency is greatly improved compared with that of a single machine. Therefore, it can fulfill the requirements of many 2D and 3D visualization clients.