本文關(guān)鍵詞： 元數(shù)據(jù)自動提取 空間數(shù)據(jù)共享 OGC 樣式渲染　出處：《河南大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：為促進(jìn)空間數(shù)據(jù)更好地服務(wù)于煤礦企業(yè)的開發(fā)和利用，空間數(shù)據(jù)網(wǎng)絡(luò)化服務(wù)變得非常重要，隨著互聯(lián)網(wǎng)技術(shù)的快速發(fā)展，WebGIS技術(shù)已逐步成為空間數(shù)據(jù)網(wǎng)絡(luò)發(fā)布的主要技術(shù)途徑，由于空間數(shù)據(jù)具有多源、異構(gòu)、分布的特點(diǎn)，且傳統(tǒng)WebGIS地圖發(fā)布在技術(shù)上存在地圖請求響應(yīng)速度慢、網(wǎng)絡(luò)傳輸占用帶寬高、交互能力差、用戶體驗(yàn)性能低等問題，不能滿足海量空間數(shù)據(jù)在線服務(wù)的要求。為解決上述問題，本文分析了傳統(tǒng)WebGIS技術(shù)存在的問題，深入研究了REST（Representational State Transfer，表述性狀態(tài)轉(zhuǎn)移）架構(gòu)思想和OGC空間信息網(wǎng)絡(luò)共享標(biāo)準(zhǔn)協(xié)議等技術(shù)，提出了基于柵格數(shù)據(jù)預(yù)切分與按需切分相結(jié)合和矢量數(shù)據(jù)樣式渲染的地圖發(fā)布技術(shù)，并在此基礎(chǔ)上，實(shí)現(xiàn)了煤礦空間數(shù)據(jù)的共享和集成發(fā)布。本文的主要成果有以下幾點(diǎn)： （1）提出基于數(shù)據(jù)模型分組的元數(shù)據(jù)管理技術(shù)，將元數(shù)據(jù)和數(shù)據(jù)模型分組管理，靈活地注冊、修改和刪除元數(shù)據(jù)。同時，每種數(shù)據(jù)模型對應(yīng)一個元數(shù)據(jù)自動提取插件，，實(shí)現(xiàn)元數(shù)據(jù)、數(shù)據(jù)模型和元數(shù)據(jù)約束規(guī)則相結(jié)合的多維空間數(shù)據(jù)管理，從而為煤礦空間數(shù)據(jù)的動態(tài)查詢和發(fā)布奠定基礎(chǔ)。 （2）提出基于REST架構(gòu)思想的柵格數(shù)據(jù)發(fā)布技術(shù)，將GeoServer開源項(xiàng)目依據(jù)該思想進(jìn)行功能擴(kuò)展，實(shí)現(xiàn)柵格數(shù)據(jù)的自動批量發(fā)布。同時改進(jìn)了GeoWebCache的瓦片檢索機(jī)制，減少了瓦片比較次數(shù)；引入預(yù)先切分與按需切分相結(jié)合的切片機(jī)制，以適應(yīng)靜態(tài)和動態(tài)兩種模式下的影像數(shù)據(jù)發(fā)布，通過兩種方式的優(yōu)化改進(jìn)，提高了瓦片切分和檢索速度，從而改善了用戶體驗(yàn)。 （3）提出空間矢量數(shù)據(jù)樣式渲染發(fā)布方案，利用SLD進(jìn)行點(diǎn)、線、面矢量數(shù)據(jù)的符號樣式定制，使矢量數(shù)據(jù)的符號化特征得以發(fā)布共享，提高了矢量數(shù)據(jù)發(fā)布的圖形豐富度和交互查詢能力。 基于上述技術(shù)和方法，設(shè)計(jì)和開發(fā)了空間信息網(wǎng)絡(luò)共享發(fā)布平臺。實(shí)現(xiàn)了空間數(shù)據(jù)的自動發(fā)布、多圖層疊加、透明度控制、二三維顯示瀏覽、元數(shù)據(jù)組合查詢等發(fā)布服務(wù)，為空間信息數(shù)據(jù)在不同部門不同單位的信息共享提供解決方案。并對神東礦區(qū)的基礎(chǔ)矢量圖層、遙感監(jiān)測影像、專題圖層、現(xiàn)場監(jiān)測數(shù)據(jù)等進(jìn)行了發(fā)布測試，驗(yàn)證了此系統(tǒng)能充分滿足空間數(shù)據(jù)在線發(fā)布服務(wù)的需求。
[Abstract]:In order to promote the development and utilization of spatial data in coal mining enterprises, spatial data networking service becomes very important. With the rapid development of Internet technology, WebGIS technology has gradually become the main technical approach of spatial data network publishing. Because of the characteristics of multi-source, heterogeneous and distributed spatial data, the traditional WebGIS map publishing has some problems, such as slow response speed of map request, high bandwidth of network transmission, poor interaction ability, low performance of user experience, and so on. In order to solve the above problems, this paper analyzes the problems existing in the traditional WebGIS technology. In this paper, the architecture of REST(Representational State transfer and the standard protocol of OGC spatial information network sharing are deeply studied. A map publishing technology based on raster data pre-segmentation and on-demand segmentation and vector data style rendering is proposed. On this basis, the sharing and integration of coal mine spatial data is realized. The main achievements of this paper are as follows:. (1) A metadata management technology based on data model grouping is proposed. Metadata and data models are grouped to manage, register, modify and delete metadata flexibly. At the same time, each data model has a metadata extraction plug-in. The multi-dimensional spatial data management which combines metadata, data model and metadata constraint rules is realized, which lays a foundation for dynamic query and publication of coal mine spatial data. (2) the raster data publishing technology based on REST architecture is put forward, according to which the GeoServer open source project is extended to realize the automatic batch release of grid data. At the same time, the retrieval mechanism of GeoWebCache tile is improved, and the number of tile comparison is reduced. The slicing mechanism of pre-segmentation and on-demand segmentation is introduced in order to adapt to the image data distribution in both static and dynamic modes. Through the optimization and improvement of the two methods, the speed of tile segmentation and retrieval is improved, and the user experience is improved. (3) A scheme of rendering and publishing space vector data style is proposed. The symbol style of point, line and plane vector data can be customized by using SLD, so that the symbolic features of vector data can be published and shared. The graphic richness and interactive query ability of vector data publishing are improved. Based on the above techniques and methods, a spatial information network sharing publishing platform is designed and developed, which realizes the automatic publishing of spatial data, multi-layer superposition, transparency control, two-dimensional display and browsing, metadata combination and query, etc. To provide a solution for the sharing of spatial information data in different departments and units, and to publish and test the basic vector map layer, remote sensing monitoring image, thematic map layer and field monitoring data of Shendong mining area, etc. It is verified that this system can fully meet the demand of spatial data online publishing service.
【學(xué)位授予單位】：河南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：P208;TP391.41

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