數(shù)字高程模型的建立方法與精度評(píng)定畢業(yè)論文-wenkub
2023-07-08 18:31:41 本頁(yè)面
【正文】 DEM內(nèi)插數(shù)學(xué)模型.................................................................................................... 9 整體內(nèi)插............................................................................................................ 9 分塊局部?jī)?nèi)插.................................................................................................. 10 逐點(diǎn)內(nèi)插法...................................................................................................... 10 3 TIN的構(gòu)建....................................................................................................................... 11 TIN的建立................................................................................................................ 11 ....................................................................................................... 12 三角網(wǎng)生長(zhǎng)法.................................................................................................. 12 分而治之法...................................................................................................... 12 TIN的三角剖分 ...................................................................................................... 13 TIN建立的設(shè)計(jì).......................................................................... 14 4 DEM建立實(shí)驗(yàn)及分析.................................................................................................... 18 ............................................................................................................... 18 ............................................................................................................... 19 ................................................................................................... 19 5質(zhì)量檢查與精度評(píng)定...................................................................................................... 25 DEM誤差及誤差源.................................................................................................. 25 DEM精度檢查和評(píng)估技術(shù)...................................................................................... 25 影響 DEM精度的主要因素........................................................................... 25 DEM精度檢查的內(nèi)容.................................................................................... 25 DEM精度評(píng)定.......................................................................................................... 26 精度評(píng)價(jià)區(qū)域選取.......................................................................................... 26 精度評(píng)定方法.................................................................................................. 27 6 總結(jié)與展望..................................................................................................................... 31 .................................................................................................................... 31 ............................................................................................... 32 參考文獻(xiàn)............................................................................................................................. 33指導(dǎo)教師簡(jiǎn)介..................................................................................................................... 35 致謝..................................................................................................................................... 36 1 緒論 論文研究的目的、意義 美國(guó)麻省理工學(xué)院 Chaires L M iller教授于 19561958年首次提出了數(shù)字高程模型（ Digital Elevation Model， DEM）的概念， DEM自 20世紀(jì) 50年代后期開(kāi)始被采用，并在測(cè)繪、土木工程、地質(zhì)、礦山工程、景觀建筑、道路設(shè)計(jì)、防洪、農(nóng)業(yè)、規(guī)劃、軍事工程等諸多領(lǐng)域得到了廣泛應(yīng)用。關(guān)鍵詞：數(shù)字高程模型（ DEM）不規(guī)則三角網(wǎng)（ TIN）格網(wǎng) DEM 精度等高線Methods of Building DEM and Accuracy Assessment Abstract Digital Elevation Model is a kind of discrete digital expression to the terrain relief of the earth surface. As the most important spatial information in geographical database, DEM plays a more and more important role in many areas，such as GIS, RS, VR, digital battlefield and so on. Therefore, how to produce high quality DEM and how to evaluate the accuracy of DEM bee hotspots in the research of DEM, They are very important in theoritics and valuable in use. The paper have discussed the theories and methods on how to produce high quality DEM data based on terrain feature from digital contour lines. Then we pared some popular methods of building DEM at home and abroad and tried to build the Triangulated Irregular Network model from contour lines using the software of also built TIN using the Visual . In the research of DEM, its accuracy influences the producers and users, hence people always hope DEM can reflect the fluctuantion of the earth surface exactly and objectively. Meanwhile, the paper assessed the precision of the DEM data by contour lines overlay and observe points. At last, the paper summarized research productions and development direction. Keywords：DEM (Digital Elevation Model)。采用 （ TIN）。西南林學(xué)院本科畢業(yè)（設(shè)計(jì)）論文題目：數(shù)字高程模型（DEM）的建立方法與精度評(píng)定教學(xué)院系資源學(xué)院專(zhuān)業(yè)地理信息系統(tǒng) 評(píng)閱人 數(shù)字高程模型（DEM）的建立方法與精度評(píng)定 摘 要數(shù)字高程模型（ Digital Elevation Model，DEM）是對(duì)地球表面地形地貌的一種離散的數(shù)字表達(dá)，是地理信息系統(tǒng)、遙感、虛擬現(xiàn)實(shí)、數(shù)字化戰(zhàn)場(chǎng)等領(lǐng)域賴(lài)以進(jìn)行三維空間數(shù)據(jù)處理與地形分析的核心數(shù)據(jù)，是國(guó)家地理信息的基礎(chǔ)數(shù)據(jù)之一。同時(shí)，基于 TIN
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