本文選題：REST + 瓦片地圖��； 參考：《江西理工大學(xué)》2013年碩士論文

【摘要】：當(dāng)前GIS已經(jīng)進(jìn)入了以服務(wù)為主要特征的空間信息共享的時(shí)代，大多數(shù)的地圖服務(wù)通過(guò)服務(wù)器緩存瓦片地圖來(lái)提高系統(tǒng)的響應(yīng)能力，然而各種方案對(duì)接口的定義各不相同，難以相互兼容，這為客戶端訪問(wèn)各種瓦片地圖服務(wù)帶來(lái)了復(fù)雜性。為了統(tǒng)一瓦片地圖服務(wù)的接口，提高服務(wù)系統(tǒng)的性能，增強(qiáng)客戶端的用戶體驗(yàn)，本文遵循OGC的WMTS規(guī)范，將表述性狀態(tài)轉(zhuǎn)移(REST)架構(gòu)風(fēng)格引入到瓦片地圖服務(wù)中進(jìn)行了研究。 首先，論文闡述瓦片地圖的相關(guān)技術(shù)，，分析了切割生成瓦片地圖的算法和存儲(chǔ)管理瓦片的目錄組織，研究了瓦片地圖緩存的動(dòng)態(tài)更新機(jī)制，利用客戶端的緩存機(jī)制對(duì)瓦片地圖進(jìn)行預(yù)提取。 其次，研究了瓦片地圖Web服務(wù)中的資源，并在獲取服務(wù)的技術(shù)層面上遵循WMTS規(guī)范，對(duì)提供瓦片地圖Web服務(wù)的三個(gè)重要接口實(shí)現(xiàn)了REST風(fēng)格轉(zhuǎn)換。然后，基于REST風(fēng)格設(shè)計(jì)了一個(gè)由客戶端表現(xiàn)層、服務(wù)層、數(shù)據(jù)存儲(chǔ)層組成的瓦片地圖Web服務(wù)原型系統(tǒng)，并詳細(xì)說(shuō)明了系統(tǒng)各部分的功能及系統(tǒng)的工作流程。 最后，采用開(kāi)源軟件搭建一個(gè)瓦片地圖Web服務(wù)原型系統(tǒng)，并對(duì)瓦片地圖Web服務(wù)系統(tǒng)進(jìn)行實(shí)驗(yàn)測(cè)試，驗(yàn)證了REST風(fēng)格瓦片地圖服務(wù)的性能具有優(yōu)越性。 研究結(jié)果表明，REST風(fēng)格瓦片地圖Web服務(wù)能夠緩解網(wǎng)絡(luò)傳輸負(fù)載，加快響應(yīng)速度，增強(qiáng)客戶端的用戶體驗(yàn)，有利于地理信息服務(wù)的合理部署與應(yīng)用，它對(duì)于地理信息共享的途徑選擇和效率的提升具有一定的參考價(jià)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.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P208

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