基于REST的瓦片地图Web服务研究

发布时间：2018-06-30 20:54

本文选题：REST + 瓦片地图　；参考：《江西理工大学》2013年硕士论文

【摘要】：当前GIS已经进入了以服务为主要特征的空间信息共享的时代，大多数的地图服务通过服务器缓存瓦片地图来提高系统的响应能力，然而各种方案对接口的定义各不相同，难以相互兼容，这为客户端访问各种瓦片地图服务带来了复杂性。为了统一瓦片地图服务的接口，提高服务系统的性能，增强客户端的用户体验，本文遵循OGC的WMTS规范，将表述性状态转移(REST)架构风格引入到瓦片地图服务中进行了研究。首先，论文阐述瓦片地图的相关技术，，分析了切割生成瓦片地图的算法和存储管理瓦片的目录组织，研究了瓦片地图缓存的动态更新机制，利用客户端的缓存机制对瓦片地图进行预提取。其次，研究了瓦片地图Web服务中的资源，并在获取服务的技术层面上遵循WMTS规范，对提供瓦片地图Web服务的三个重要接口实现了REST风格转换。然后，基于REST风格设计了一个由客户端表现层、服务层、数据存储层组成的瓦片地图Web服务原型系统，并详细说明了系统各部分的功能及系统的工作流程。最后，采用开源软件搭建一个瓦片地图Web服务原型系统，并对瓦片地图Web服务系统进行实验测试，验证了REST风格瓦片地图服务的性能具有优越性。研究结果表明，REST风格瓦片地图Web服务能够缓解网络传输负载，加快响应速度，增强客户端的用户体验，有利于地理信息服务的合理部署与应用，它对于地理信息共享的途径选择和效率的提升具有一定的参考价值。
[Abstract]:At present, GIS has entered the era of spatial information sharing with service as the main feature. Most map services improve the response ability of the system by caching tile maps by server. However, the definition of interface is different in various schemes. It is difficult to be compatible with each other, which brings complexity to client access to various tile map services. In order to unify the interface of tile map service, improve the performance of service system and enhance the user experience of client, this paper follows the WMTS specification of OGC, and introduces the structure style of expressing character state transfer (rest) into tile map service. First of all, the paper expatiates the related technology of tile map, analyzes the algorithm of cutting and generating tile map and the directory organization of storage management tile, and studies the dynamic updating mechanism of tile map cache. The client-side cache mechanism is used to pre-extract the tile map. Secondly, the resources in the tile map Web service are studied, and the WMTS specification is followed at the technical level of obtaining the service. The rest style transformation of three important interfaces to provide the tile map Web service is implemented. Then, based on rest style, a prototype system of tile map Web service is designed, which is composed of client presentation layer, service layer and data storage layer. The functions of each part of the system and the workflow of the system are described in detail. Finally, an open source software is used to build a prototype system of tile map Web service, and an experimental test of tile map web service system is carried out, which verifies the performance of rest style tile map service is superior. The results show that the REST-style tile map Web service can alleviate the network transmission load, speed up the response speed, enhance the user experience of the client, and facilitate the rational deployment and application of geographic information services. It has certain reference value for the choice of geographical information sharing and the improvement of efficiency.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208

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