【摘要】：隨著"數(shù)字地球"、"智慧城市"等概念的相繼推出,基于虛擬地球的地理信息的三維可視化得到了蓬勃的發(fā)展,尤其是近幾年網(wǎng)絡(luò)技術(shù)WebGL和HTML5技術(shù)誕生,使得網(wǎng)絡(luò)三維可視化扮演越來越重要的角色。氣象數(shù)據(jù)的可視化分析可以幫助氣象科學(xué)家研究氣候變化,預(yù)測(cè)天氣變化。對(duì)于普通用戶,直觀的天氣信息可視化可以幫助他們了解天氣狀況,做出有效的決策。現(xiàn)有軟件氣象可視化軟件在一定程度上解決了部分氣象數(shù)據(jù)可視化的問題,然而沒有一款可以提供一套完整的解決方案,當(dāng)遇到海量,高分辨率和異構(gòu)的氣象數(shù)據(jù)時(shí),缺乏有效手段。且難以與其他影像和地形等基礎(chǔ)數(shù)據(jù)集成疊加。因此本文在已有研究的基礎(chǔ)之上,總結(jié)分析了當(dāng)前市場(chǎng)上主流的網(wǎng)絡(luò)三維可視化平臺(tái)的發(fā)展現(xiàn)狀、各自平臺(tái)的優(yōu)點(diǎn)和不足,對(duì)HTML5和WebGL技術(shù)在三維圖形渲染以及客戶端免插件可視化方面的技術(shù)進(jìn)行研究,對(duì)不同數(shù)據(jù)類型、數(shù)據(jù)結(jié)構(gòu)氣象數(shù)據(jù)進(jìn)行討論,并根據(jù)其各自特點(diǎn)對(duì)在網(wǎng)絡(luò)環(huán)境下數(shù)據(jù)可視化問題進(jìn)行深入地研究。基于WebGL開發(fā)了氣象三維信息系統(tǒng),實(shí)現(xiàn)了免瀏覽器插件的B/S架構(gòu)的可視化平臺(tái)。從數(shù)據(jù)獲取、數(shù)據(jù)預(yù)處理、數(shù)據(jù)存取策略到客戶端數(shù)據(jù)渲染、數(shù)據(jù)調(diào)度等多個(gè)方面進(jìn)行改進(jìn),建立一系列的調(diào)度策略從而實(shí)現(xiàn)了加入時(shí)間維度后的氣象數(shù)據(jù)地動(dòng)態(tài)可視化,實(shí)現(xiàn)和其他如遙感影像和地形等地理信息數(shù)據(jù)疊加顯示并在此平臺(tái)中實(shí)現(xiàn)量測(cè)、空間查詢等GIS功能。
[Abstract]:With the introduction of the concepts of "digital earth" and "intelligent city", the 3D visualization of geographic information based on virtual earth has been developed vigorously, especially the birth of WebGL and HTML5 technology in recent years. Network 3D visualization plays a more and more important role. Visual analysis of meteorological data can help meteorological scientists to study climate change and predict weather change. For ordinary users, visual visualization of weather information can help them understand weather conditions and make effective decisions. The existing software weather visualization software solves some problems of meteorological data visualization to some extent. However, none of them can provide a complete solution when it comes to massive, high-resolution and heterogeneous meteorological data. Lack of effective means. And it is difficult to integrate and superposition with other basic data such as image and terrain. Therefore, based on the existing research, this paper summarizes and analyzes the current situation of the mainstream network 3D visualization platform in the market, the advantages and disadvantages of each platform. In this paper, the techniques of HTML5 and WebGL in 3D graphics rendering and client-free visualization are studied, and the meteorological data of different data types and data structures are discussed. And according to their own characteristics of data visualization in the network environment in-depth study. A 3D meteorological information system based on WebGL is developed, and a visual platform of B / S architecture without browser plug-in is implemented. From the aspects of data acquisition, data preprocessing, data access strategy to client data rendering, data scheduling and so on, a series of scheduling strategies are established to realize the dynamic visualization of meteorological data after adding time dimension. And other geographic information data such as remote sensing image and terrain are superimposed and displayed and GIS functions such as measurement spatial query and so on are realized in this platform.
【學(xué)位授予單位】：天津師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P409

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